Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0bad7bb9745f40…

MALICIOUS

PDF

59.5 KB Created: 2020-10-28 18:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b5d0797e61f929884c13cc52e4e9f017 SHA-1: 5d19c7f5890b821371e1e4af930dbfd4c8ae23ea SHA-256: 5c0bad7bb9745f4014402adfcf1901a15cc6fb496a24c6a6fc64fcfbd38b69aa
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.me/123?keyword=halar+o+jalar+pronunciacion In PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/402a8b2aad0.pdfIn PDF document text
    • https://rojumiladikeju.weebly.com/uploads/1/3/4/3/134315163/34ea1296.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/rebumilefuximud.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/sifala.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/6093794d1d31940.pdfIn PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/5747786.pdfIn PDF document text
    • https://gokajafiwewafij.weebly.com/uploads/1/3/4/3/134314986/f258314.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/kevobizab.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/wekaxo.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/1220790.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e32b1dcd-615b-4481-b156-39bc7ba6e905/1947137054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30c34e6-767f-497d-9f01-7ed9b32195d1/webin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb37d5b-b212-4126-89e8-32161d0659c5/unis_remote_manager_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3154/1952/files/acmarket_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59e5d6d-58d1-4663-b245-089d53b95ff1/38132760868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3259/2027/files/tascam_gb-10_guitar_and_bass_trainer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9573c80d-e133-4a45-873a-8d054fad3377/3238516597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e973cb63-f70c-4db1-b486-99485c140a30/repogaxuxavetegejapig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf4d2f5-dc25-45ae-b872-c8f3d1b4e134/99565443396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1534/7617/files/910792324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b22203b9-c703-48a8-ad46-709e4095c766/85987615569.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_off00009e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0A 4468 bytes
SHA-256: 3cf060c115ddf70f19c73bfadd5fa56b3bfa1c9be9d48c53fc9a5b78a1e9c4d9
font_01_sfnt_off0000ad31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD31 11108 bytes
SHA-256: e66c3b48c0b225bb4dd93c32d705745d44a97a8c242cf0ab27665a4c3a8eaeeb
font_02_sfnt_off0000d24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c