Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb36dc2c779e303…

MALICIOUS

PDF

45.9 KB Created: 2020-09-01 12:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1278a26621f02458e1b8fe6ab9fc7934 SHA-1: 395945f6d0545e54895c718828f9bd8d0d1b4088 SHA-256: 5bb36dc2c779e303da01db08a8724248eb5e309d9581458b8016937e3121a0cf
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body and embedded link structure indicate an attempt to drive traffic to external sites, likely for malicious purposes. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest malicious intent.

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.me/wix?keyword=sap+bpc+optimized+for+s%252F+4hana+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/tabewobigumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/wotiropaligubanujafojaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/jeep_cherokee_laredo_2012_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/aristotelis_poetika.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8266/files/vixota.pdf
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/english_speaking_app_free_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/tureladikigute.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/imperfect_verb_endings_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/canales_de_distribucion_de_bimbo.pdf
    • https://static.usrfiles.com/ugd/b8c837_17210462a724451698488763164e7bf8.pdf
    • https://static.usrfiles.com/ugd/857e61_554d08c5b53541fbb7ee695fedd12fbc.pdf
    • https://static.usrfiles.com/ugd/278743_c7f5a8ad484e4f6994a11ba10370c75c.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8609/files/lusibuvabuwujegibexol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/arunachalam_movie_tamil_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/18514349251.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/lavazolotudusoralu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/sujuweverubanupo.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_off00007365.bin
fd621bd59ac9096f4474393f8d29d279ab0579a079e276e7581f356c94bae45a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7365 5780 bytes
font_01_sfnt_off000086fd.bin
343e393f2e7feb678ff5d55525ab0b9c209a3044c8a2f3d1d906698a4a1d1b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FD 10580 bytes

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