Malicious PDF — malware analysis report

Static analysis result for SHA-256 1965511fdf466e35…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 16:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca0f799a3ed2336bf98d7d554b20d91f SHA-1: efe6291368f0e9659efb0041fbcde71687ee6e51 SHA-256: 1965511fdf466e35dea077370b86d7af0f040f0cb2db669c4f82de6aea59ba67
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=icloud+contacts+to+windows'. This URL is presented within the document body, suggesting a phishing or scam attempt to redirect users to malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the nature of the redirector and link farm suggests an attempt to drive traffic to potentially malicious 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.ru/pify?keyword=icloud+contacts+to+windows
    • http://files.rtpliving.com/uploads/1/3/1/6/131637419/9162558.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/18361563690.pdf
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/wosubeliluwusatalo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/zitenikuwizonifixidukos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/65600750729.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/nts_analytical_reasoning_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/rabafusegifodaramuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/31206386858.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/cuisinart_vanilla_ice_cream_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7176/5656/files/organigrama_del_poder_judicial_federal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4201/files/9935353911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/limav.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_off00006637.bin
b706dd55e8d4116a0ae42765d60bba3e2bbbc722ca8e0714c484aec2d4cc709b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6637 4868 bytes
font_01_sfnt_off000076dc.bin
648e4f35f9a29c73e4ffcee78c019ac7c68da08ebd5d672b5a3c800b5ccee87b
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 10764 bytes