Malicious PDF — malware analysis report

Static analysis result for SHA-256 885ab3462d914c9c…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 07:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11d5912b4681ec81e370c46dc8f6cdcb SHA-1: 3c1106b1b0f25ef43b031d97571600f74eb56b60 SHA-256: 885ab3462d914c9cfe0e714e0d31581faa1d0b13745a782e4efc825d609e0c46
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate an attempt to lead users to harmful sites.

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.com/wix?keyword=mens+formal+ankle+boots+uk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b3bc21_14aa58ea170847fc90f212fcbb27b30d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba81411a5788433eb5a317c500da141c.pdf
    • https://static.usrfiles.com/ugd/d63aaf_ebb399314295454e87cfc4ae681aeaf8.pdf
    • https://static.usrfiles.com/ugd/0aab01_4f4f57511ebc464aa7644b79801791ac.pdf
    • https://cdn.shopify.com/s/files/1/0466/3033/8725/files/best_wap_full_movie_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/5755377164.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/medical_laboratory_technician_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/titome.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/online_games_with_friends.pdf
    • https://static.usrfiles.com/ugd/b8c837_f557e4f7c1954be19abf8718eafa25c8.pdf
    • https://static.usrfiles.com/ugd/5cf23b_c15ee35d899f4f3395b5c3fbcda71217.pdf
    • https://static.usrfiles.com/ugd/33ab24_5ac681610c2445f8b544545919b9bc3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0065230e734c89bf394a82127e6c96.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/zumefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/waxemibiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/tijifuzij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/fish_tank_stardew_valley.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_off0000585f.bin
af3906872643c9e353a19fb87f8fed238e2ed895e040f65bc582a336c55dbad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585F 5124 bytes
font_01_sfnt_off000069be.bin
e33af13443c9084edb573b33f025bee293c93d7586ad8b7c3e19bf3351487926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 13352 bytes

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