Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6e069ba43c99b1…

MALICIOUS

PDF

32.9 KB Created: 2020-08-17 18:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c672b1c1c57a79aa212a70541448e12 SHA-1: 1bfc36fa953b4164de798c1acb877cd8084b3270 SHA-256: 5a6e069ba43c99b1637358a5d2498c54a193ea0ea2b53e1b353e4bf54508be56
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding. The presence of many external links suggests an attempt to drive traffic to potentially malicious sites, possibly as part of a phishing or scam campaign.

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=back+to+the+future+poster
    • http://lukuwo.lukecmartin.com/uploads/1/3/0/9/130969080/78e43.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/patisise.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/tobapunubidufukuso.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/56117662849.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/97695925285.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5557/files/33755515575.pdf
    • https://cdn.shopify.com/s/files/1/0434/1019/4582/files/azteca_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/49175621876.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/990684643.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/65087502075.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/45897111482.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/75271984292.pdf
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/icy_veins_protection_paladin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/and_install_a_creative_cloud_trial.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/functional_language_esl.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_off000043ce.bin
b02e7836c0fc19199d24f852b2edeb20b5061a713d9174a9ee27728096a8dfc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x43CE 5184 bytes
font_01_sfnt_off00005567.bin
61e9c40152c120a51f3030b9ca09be0942f1f932a0fdb6080458e7d99e935c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x5567 9840 bytes