Malicious PDF — malware analysis report

Static analysis result for SHA-256 3589d9b08e579bab…

MALICIOUS

PDF

35.4 KB Created: 2020-08-11 13:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eda3d5539c3525711d9610a53def2b71 SHA-1: 006087ce1a5d91a5c9442920e060d79795496c67 SHA-256: 3589d9b08e579babac042a50e4e4922fb1d368754818718e4c06135872f9fd66
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc'. Another critical heuristic noted a large PDF link farm, with many links pointing to Shopify domains, suggesting a tactic to distribute malicious content disguised as legitimate documents. The presence of these links indicates an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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=bd+chaurasia+handbook+of+general+anatomy+pdf+6th+edition
    • http://files.northlightsfauxmagerie.org/uploads/1/3/1/4/131438761/wadulixuk_dokogifiwabi_sevijugiravu.pdf
    • http://files.bespokebrowsnyc.com/uploads/1/3/1/4/131437987/bukuwoxud-geredat.pdf
    • http://files.immigrationusalawyer.com/uploads/1/3/0/8/130874253/e75dc61179.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/mamogenesis_lactogenesis_y_galactopoyesis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/92131498426.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7992/files/rexokanubifip.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/pdf_stephen_king.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/siriwajobem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/90145679407.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/history_of_anglican_church_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9801/files/jigabedozivop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/da_67-_10-_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/bepuwotitelorun.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/71955753551.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/add_and_subtract_fractions_with_unlike_denominators.pdf
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/karizogivudurunudujifofag.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/rodiwedup.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_off00004aac.bin
c23d23c86995941b9432654ba3f177122b9d26a0d7a83b66a8adf1b369e807f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAC 6076 bytes
font_01_sfnt_off00005f2e.bin
aa9f3db2c40ffb1c69d46876e6605e8c29611d11d6228114cf31ea528776d02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 9744 bytes

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