Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcf98e8f2f8899f…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 13:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17368bf9b42158d196b2b399357c68b5 SHA-1: b5ce6bfe92d53de9018a5c801a8d26c86c9e08b3 SHA-256: 6fcf98e8f2f8899f88754c82f80d9bbde8f3355deac3d681bc023a8d5e14a028
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'team meeting minutes template pdf' and includes the malicious URL. This indicates a phishing or social engineering attempt to redirect users to harmful 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/pify?keyword=team+meeting+minutes+template+pdf
    • http://files.recoveryspecialistsinrome.com/uploads/1/3/1/3/131398091/witidumusel_darumijubabige.pdf
    • http://lirif.dunsmuirdeerhounds.com/uploads/1/3/2/8/132814930/7ff681b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/83322868174.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/kadafuturira.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/dufus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/pivubibalawokokekejurabud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/girukunox.pdf
    • https://cdn.shopify.com/s/files/1/0437/3089/4999/files/biometric_access_control_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/tiliburulapizes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/rorozotitufebebesosiputo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7867/1783/files/abandono_escolar_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/lizixix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/concepto_de_equidad_e_igualdad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/70941118230.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/jezega.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_off0000736c.bin
7cf042a441eabbebea117d2eaf198438b3de5269d5b3290ef7c8cfcd08f81da5
pdf-font-stream PDF embedded font (sfnt) at offset 0x736C 5216 bytes
font_01_sfnt_off0000851d.bin
5cb904af34e74ccca8445efe8cdfdecffc8e26fa51a2302d12764522a459cbe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x851D 10128 bytes