Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc8ed7d6b2cff69…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 11:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89ae60c8150ad020b1ca4740db15324f SHA-1: bbe308a56e3aa35816f710316123d1ea7173f3da SHA-256: 0dc8ed7d6b2cff699738b95cb6e0526b5a266674a140bbed5d413d57d19803f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or SEO spam content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'ttraff.cc', indicating a malicious redirector. The 'PDF_SEO_LINK_FARM' heuristic further supports this by identifying a large number of outbound links, suggesting an attempt to manipulate search engine results or distribute malicious content.

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://ttraff.cc/pify?keyword=advantages+of+internet+in+education+pdf
    • http://files.drbrendaeabbey.com/uploads/1/3/0/7/130775252/2515404.pdf
    • http://files.westfieldbouncehouserentals.com/uploads/1/3/1/3/131384789/4605166.pdf
    • http://gepika.rideon365.com/uploads/1/3/0/7/130740178/3464387ba3.pdf
    • http://sasibaz.fireworksstoreonline.com/uploads/1/3/0/7/130739654/boxebibod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/tefoxobupowotodokerebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/91843511388.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/rukakiwajapiwokagibego.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/xewosimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/anaximenes_of_miletus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/61984075245.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/30117023331.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/melafasotak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/ginirajasutoruxozobate.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/22056937530.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d8f.bin
1f47a0a6bc1817d0296ea9a45fd2eaee030747f2b4eab533492b116a51919fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 5340 bytes
font_01_sfnt_off00007fda.bin
734eae555556f65a6c8cfa1630dc68834ca5dd035012a80ad6fa7488e4dacd23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 11348 bytes

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