Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b5af0738600232…

MALICIOUS

PDF

36.4 KB Created: 2020-08-09 07:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25008f1daf619c41fb9c5d8467f48cb2 SHA-1: 9d2e900683d4df080b21ca5821e58fb10dfcacf8 SHA-256: c3b5af07386002322a68205fa8ba79c5d8753d1f079e6d0a516a198e8f9234b2
154 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and contains a high density of embedded external links, many pointing to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=guadalajara+cardiologia+pdf+8+edicion`. The document body, though partially corrupted, contains this same URL and other Shopify links, suggesting the primary intent is to redirect users to potentially malicious content through a link farm.

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/pify?keyword=guadalajara+cardiologia+pdf+8+edicion
    • http://files.michellemckinstry.com/uploads/1/3/1/1/131164236/xotekiliru-dumat-sakorobe.pdf
    • http://files.listingagentofatl.com/uploads/1/3/1/0/131070207/72777210.pdf
    • http://files.moroccancookbook.com/uploads/1/3/0/8/130874060/bexijudojezawun.pdf
    • http://files.akrosdayunibers.com/uploads/1/3/0/8/130813461/7531819.pdf
    • http://files.triplex-arrow.com/uploads/1/3/0/8/130874010/lifokoko_bikobimemi_guvemi_zanebarotef.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/82261854871.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/lezaranedosejir.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/lurirajaliloligegoguk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/sivogurojibezulipafipif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/farmacos_anticolinergicos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/tibojalufixepopilelekox.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/liduzerexo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/zemiwezipilowadoxir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/javascript_divisible_by_3_and_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/tech_n9ne_killer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/87104558672.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_off00004cb6.bin
ef38cec39c0efd13fbbbf90f07cff2432aa2ed359fe38d665a92b39b590472bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB6 5448 bytes
font_01_sfnt_off00005f57.bin
3a7b4e7215b4f4a7f9fcf09fdacfd5c9fc59ec0fbfdb31029211d7a6442f1062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 11472 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.