Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d2ac5f14091a96…

MALICIOUS

PDF

42.7 KB Created: 2020-08-26 01:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f49be00c9d9e7ce0c8754055ec09a9 SHA-1: 002582d4c9fff8a8988b67d79979d0b5bf352ffb SHA-256: 03d2ac5f14091a965d670be51b56dc26b36eea99a05d1f145f748053b6c367cd
154 Risk Score

Malware Insights

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

The PDF contains a list of URLs, including a malicious redirector at 'https://ttraff.ru/pify?keyword=6+speed+manual+transmission+cars+list'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The presence of numerous external PDF links, many pointing to benign Shopify URLs, indicates a link farm strategy, likely to improve SEO for the malicious redirector. No scripts were extracted, but the overall structure and embedded URLs point to a phishing or redirection attack.

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=6+speed+manual+transmission+cars+list
    • http://xunugaxi.urjcmunnews.com/uploads/1/3/2/8/132814930/tuxupipu.pdf
    • http://towidud.maikenmsrd.com/uploads/1/3/1/4/131408984/3648758.pdf
    • http://xipekal.gibelin.eu/uploads/1/3/1/3/131379510/3b61b280.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/beps_action_1_final_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7640/9751/files/inflammatory_bowel_disease_patient_education.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/26044361815.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/irregular_adverbs_of_manner.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/atomic_structure_chapter_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/minecraft_wild_west.pdf
    • https://cdn.shopify.com/s/files/1/0435/5892/8545/files/sample_job_offer_letter.pdf
    • https://cdn.shopify.com/s/files/1/0437/5442/2423/files/13271015649.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/vesezime.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/tamixamutinogoroso.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_off00006a5b.bin
d27e6a3c330a5da8674ada1df71fa468604b26a8c36c2652395b6be9eb1e2920
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5B 5280 bytes
font_01_sfnt_off00007c23.bin
53f274b771a3d18389955255c512e5a17ffe53e3eecac4be799a3545c2908831
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C23 9812 bytes