Malicious PDF — malware analysis report

Static analysis result for SHA-256 14019adcbaf175ec…

MALICIOUS

PDF

47.2 KB Created: 2020-10-26 17:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 255651228196367fa92f7bba215592b4 SHA-1: 387b0f9765ed429a10673882e758ecf4a9e512b0 SHA-256: 14019adcbaf175ec97ea7c267c845801dd50921fe6a208eecaaa820acd6e3d0f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by a machine learning classifier and contains numerous external links. Several heuristics indicate it functions as a link farm, with many links pointing to disposable hosting services, likely for SEO manipulation or redirecting users to malicious content. One URL, 'https://gettraff.ru/aws?keyword=job+reference+letter+sample+pdf', is identified as a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/aws?keyword=job+reference+letter+sample+pdf In PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/zizubuxefe_sofosu_gevize.pdfIn PDF document text
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/disuzolamawusiva.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/6d3a8560c5af7.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/2379673.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/vakevav_sunemigizeme_mazasemekel_muzudatatalaxim.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/535d9870.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/9920746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_5f8c7ae326e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f8b819ae9c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f8f4dc1f29c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f89eccfe89e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f966fefbfe4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/58061804859.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/getofir.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/55879880616.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/microsoft_bluetooth_mouse_5000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465c7329-b278-441c-a713-85e182677dac/saravixadizaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5275f238-2d41-40dd-8192-13a50e5e66b4/relasifogefasosobufosupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300e97e3-e334-4b63-b55c-6b6c1635139d/zilisarajakuzosiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2551/7720/files/33695478691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/abundance_chakra_healing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/kaxokezifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0037/0602/files/attila_total_war_western_roman_empire_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 3800 bytes
SHA-256: b576cb8cc2f96b53a442ff951a59e66a1d065a582dc8004fe96493855182a11e
font_01_sfnt_off00007817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 5432 bytes
SHA-256: 7ea7584055c6aae8cefe18866305d4a7e2e542e4955a1d0151c38fe594e876a8
font_02_sfnt_off00008a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6F 10680 bytes
SHA-256: e80bf9d44d456a1327510e60ce5896542d3e90e1ef6460fed4d16e3183ba458c