Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f21c5602724a1d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-17 17:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e30d8f4ec9c4048b13eee4d707735a17 SHA-1: 64b99d799d2d705516820c937fec680d141234ec SHA-256: 34f21c5602724a1d6adc2b202fbb03ef4d3499379e2c56cd6cf6455ba496f5fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised with a lure of "baby child girl picture". The ML classifier strongly indicated maliciousness, and the PDF was found to contain a large number of external links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious IOC is the ttraff.com redirector.

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.com/pify?keyword=baby+child+girl+picture
    • http://files.joejuneandmae.com/uploads/1/3/1/4/131453247/dalezizigak-fizasukenedujuf-kigijapepo.pdf
    • http://files.flawlessimagemedspa.com/uploads/1/3/2/6/132681342/bolatijilusagek.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/libaxefametorovotemexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7310/9152/files/napuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/water_pokemon_name.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/20955019689.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/xinalanunojemafirezus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7790/2241/files/49642078583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/wepomebox.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/butchery_business_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/separador_de_imagenes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/allahabad_high_court_aro_result.pdf
    • https://cdn.shopify.com/s/files/1/0451/7802/8183/files/31583548235.pdf
    • https://cdn.shopify.com/s/files/1/0440/3603/0614/files/komajekixalapuzun.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_off00006812.bin
9a3f7148908cba26f7371b0abbbbb0ba988089de9c6af4f99459a7b05aef2587
pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 5448 bytes
font_01_sfnt_off00007a8c.bin
76eb5ca816c57d0d48573879a34c6c94f37a40adafeac2f051fa5b9ada217ebf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 10400 bytes