Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9f05e7b6e2e263…

MALICIOUS

PDF

42.3 KB Created: 2020-10-11 07:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 691c03571f973ae192d0f17d92835949 SHA-1: f064e6e302eff25e23cf743d9b4ba9dd8852a96d SHA-256: 7d9f05e7b6e2e26319082731fffc46cfc8c9b66e87c2183dc6b8d52a37c3bfa0
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One of the primary links directs to a known malicious redirector, ggtraff.ru, which likely serves as a gateway to further malicious content. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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://ggtraff.ru/strik?keyword=solucionario+probabilidad+y+estadist
    • https://site-1038738.mozfiles.com/files/1038738/wizomukujumogapitano.pdf
    • https://site-1037057.mozfiles.com/files/1037057/sazomipafuvekolivez.pdf
    • https://site-1036924.mozfiles.com/files/1036924/35699502971.pdf
    • https://site-1041845.mozfiles.com/files/1041845/28645530829.pdf
    • https://site-1037265.mozfiles.com/files/1037265/lejud.pdf
    • http://lazevo.purevoyage.net/uploads/1/3/0/7/130775491/5658973.pdf
    • http://kudidosuk.homegrownfoodbasket.com/uploads/1/3/0/9/130969724/povejubixi_dojer_givitivuj.pdf
    • http://lixomu.towardsnature.net/uploads/1/3/1/4/131454394/fab727567.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0477/8790/1087/files/wow_bastion_of_twilight_location.pdf
    • https://cdn.shopify.com/s/files/1/0481/6230/8247/files/72670601522.pdf
    • https://cdn.shopify.com/s/files/1/0482/6978/7300/files/advantage_credit_inc_login.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/wenegagevone.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/51212247648.pdf
    • https://cdn.shopify.com/s/files/1/0498/1532/2786/files/61052321598.pdf
    • https://cdn.shopify.com/s/files/1/0266/9510/6741/files/pegosokuroxiwasiwusapu.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_off00006183.bin
b38411b7abc5ee0987066e53b0fa7f5d95b25692ff88a739708176607b081a6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5412 bytes
font_01_sfnt_off000073e5.bin
f53cc0ad9b164a610278371dd3ab09e81f501f5c926ad5d1a5ed83cb91d21dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 11916 bytes