Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa8f89184c1cb8c…

MALICIOUS

PDF

45.8 KB Created: 2020-10-23 20:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ab74658393c32520c2c18d19af68ce07 SHA-1: 67f241b16506d0097c00b7b2ed77f5e997a55850 SHA-256: 1fa8f89184c1cb8cea5253fcee79066ce7f014e3b6008888168698c9247daacf
154 Risk Score

Malware Insights

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

The PDF was flagged for containing a link farm pointing to malicious redirector infrastructure. The primary URL identified, https://cctraff.ru/wb?keyword=hematologia%20veterinaria%20atlas%20de%20especies%20domesticas%20comunes.pdf, is associated with known malicious activity. This suggests the document is intended to lure users to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/wb?keyword=hematologia%20veterinaria%20atlas%20de%20especies%20domesticas%20comunes.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f9239c9444e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f873d3105f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f8f06d0d764f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f8fd9f624827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f8bd332b0223.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0018/8061/files/hogwarts_mystery_cheats_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5888/7336/files/11971344776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/92444103690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3185/6805/files/monkey_boxing_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f57036-9348-4752-babc-4ca0fcad1cd1/fafomalazenarijej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ddd2b9-3d26-4c92-935c-5ace99675438/37044818619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e06b48-6327-45c9-a549-254f0c4e1ae9/97811052366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e3a106-cbc2-41e1-b1f6-545171e7e7a0/sabavopuzigivaluliwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a791fb3f-7845-4d28-8d77-60eef723e6cd/1238611637.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/all_formulas_in_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/2334680104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0341/5197/files/tubuzogozilumukarobijox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/63501864861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7924/7036/files/nuxawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea9e75e-4a80-44e2-95d6-67066e0c9266/illustrator_crack_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f3f37b-3492-4c11-8d68-f6a3fa6a3219/natetalorulepiwigejusesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b38934-6759-4e99-8373-7eb50261c64d/14048295139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1aa86a-0676-4e2b-aac0-a64db61a74e6/82954400451.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 5528 bytes
SHA-256: a2bf62b55ff04cfad6be969e166e9186101c5a132347e0d115bfd76704b5f9e1
font_01_sfnt_off00007c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C33 15020 bytes
SHA-256: 194e33a987a1c636187709a4441c44b68c475950badb41de66ff9c88ae7967f7

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