Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9f117d2ded78fe…

MALICIOUS

PDF

48.2 KB Created: 2020-08-14 12:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6bc55c028b2c40020ebb3be8afc11a SHA-1: a8f4f9013f985401f8e2289b7c3af325aa546ec2 SHA-256: ac9f117d2ded78feb83e7041cc92f1d43d7fb87d2bd67e04b669a014568d0ede
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the heuristic. The presence of a large number of external links, many hosted on cdn.shopify.com, suggests a link farm designed to attract search engine traffic or lure users to malicious sites.

Heuristics 3

  • 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.
  • 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/pify?keyword=sample+sheet+bcl2fastq
    • http://files.ellwhisperer.com/uploads/1/3/1/4/131406841/wojimuxuj_kasowenemaridu.pdf
    • http://files.irelandforme.com/uploads/1/3/0/7/130738769/pajive.pdf
    • http://files.gogreenparkridge.org/uploads/1/3/0/8/130814861/9c52553.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/lulagawav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/taller_busqueda_activa_de_empleo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/17938442688.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/ds3_lothric_knight_greatsword.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/twitter_bot_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/xifizebafexajuperatitebuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1047/files/61643849192.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1865/files/63154126991.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/26645421469.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/16163312612.pdf
    • https://cdn.shopify.com/s/files/1/0443/4070/7484/files/expense_report_auditing_concur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/35990760760.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/15026442045.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/ghost_recon_breakpoint_map.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f54.bin
77a8bfa1c03c5c6a7d04d807d17a9f6d4c3d0bfeb066a022ee510d512c5cd6fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 5660 bytes
font_01_sfnt_off0000827b.bin
6a3ea77a4603b60de7bdec4dfd3bedb32863989475ff9d012daa7f8622c856d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827B 15864 bytes

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