Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddb36b2fc1db443…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 11:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 760a07e3e2d302c6ef122bc5edace3d8 SHA-1: d2a130a891d7a66ceec2d70daa76e873a1b62034 SHA-256: 0ddb36b2fc1db443ea4b53657f6a95147b6cb98b5c2bab2a30f647f9ef4f3c04
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary links, https://ttraff.ru/pify?keyword=weight+watchers+diet+plan+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to "weight watchers diet plan pdf", indicating a lure to disguise the malicious intent. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or redirection attack.

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.ru/pify?keyword=weight+watchers+diet+plan+pdf
    • http://files.lonestarcarpetcare.com/uploads/1/3/0/7/130740477/3916618.pdf
    • http://panipe.potpieparadise.com/uploads/1/3/0/7/130775484/43dc9312.pdf
    • http://sukajobez.maskandbauble.org/uploads/1/3/1/6/131606260/nurovalupufupokozu.pdf
    • http://files.thejolielife.com/uploads/1/3/1/8/131856645/tofotizowononiw-zejijizenobuwi-senodase-nugimobot.pdf
    • http://files.jeffminick.com/uploads/1/3/2/7/132710694/78c3e5d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/nijedazavizop.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/27425805799.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/rekutorekuxaluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gozoba.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/foxomom.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/kaduledokumemejaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6984/1301/files/60127615349.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/votagilobatomoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/xamiwowazikafejagazami.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/jonewababifoxiwirivewa.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_off00006b18.bin
83f1a7620cac1f236e99569195080e5a9044eec4b5f3165bc496320e1244c075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B18 5520 bytes
font_01_sfnt_off00007df9.bin
36f4478217705a12f10f298b4cf4acebaec9ae8231f428c978a6368adc33e033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF9 10384 bytes

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