Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d48034e47be86e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-29 22:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92bc1379d256c17320fb71429c0100b3 SHA-1: 657e5b702d3f8be95e8edf43b3bb984981f0fd69 SHA-256: 71d48034e47be86e8b5eb695d1369464f06db1f88a3e3e3d4ad799850ad5a731
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords related to game downloads. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The PDF also hosts a large number of links, many pointing to benign Shopify URLs, likely as part of a link farm to improve search engine ranking for 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/wix?keyword=descargar+battlefield+3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/34732769890.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0124/files/80494057375.pdf
    • https://cdn.shopify.com/s/files/1/0438/9044/2395/files/free_residential_lease_agreement_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30552771564.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/caveat_brush_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/35394296615.pdf
    • https://static.usrfiles.com/ugd/7ff653_f671420644e14a248ba7590185437315.pdf
    • https://static.usrfiles.com/ugd/b8c837_19eb905ce2e84e5c9984de8a8255a2fc.pdf
    • https://static.usrfiles.com/ugd/3e9e83_fb565b4fa0dd4b30952c9633207dc977.pdf
    • https://static.usrfiles.com/ugd/64d889_58b10d2eb1094c5fbfee445a87e376da.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/wunalufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/pes_2011_spor_toto_sper_lig_yamas_indir_trke_spiker.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/58720033087.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/dumpper_wifi_hack_free_for_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b8e.bin
5df31c6a07d96016bcf66195a30713b2b1f6b0198d28d79b376c20a083793171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8E 5492 bytes
font_01_sfnt_off00006e3c.bin
9ee7db78a680e954fc83827cb3b0ef6d483254f0c29ad6cde1ee3630ce45ecab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 2904 bytes
font_02_sfnt_off00007a2f.bin
1ad4ce63397df3b6be7a9c6448af7104ae877fadba33bf45d3804cef8610b65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2F 10560 bytes

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