Malicious PDF — malware analysis report

Static analysis result for SHA-256 6865e9980c445f2c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-21 05:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 103904713e9a9ddf43eef7f9510641ba SHA-1: ddaa00dfbcacba02a6bcd316f7e873d990ce50b1 SHA-256: 6865e9980c445f2cce6d39c7234f1d24708f1bafcd4a5cb5ecaa1eaf5411acab
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=binomial+worksheet%2523+2+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'binomial worksheet' and numerous Shopify URLs, suggesting a link farm or content-luring tactic. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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=binomial+worksheet%2523+2+answers
    • http://zabikuba.leannecunningham.com/uploads/1/3/1/3/131383541/roxijujaxarib.pdf
    • http://files.followmytravel.net/uploads/1/3/1/4/131438869/firuboz_tukefor_setobizamodogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/7591/2090/files/three_column_cash_book_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/rafotevilavebin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/47046771331.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/85939461489.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/blindness_movie_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/9448245028.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/42783786562.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/guruxuxemuviwedujitepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/corpse_bride_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/29120179399.pdf
    • https://cdn.shopify.com/s/files/1/0432/2869/2643/files/83935789470.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/17467456050.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_off00006a67.bin
25cf8135165c73cac01c72e043baf4325d33787d8758dcbae39fc573d0d1f19c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A67 5132 bytes
font_01_sfnt_off00007bb1.bin
106781a50ed194464ce5f0e597cb6a0f27d6ac9dcffa73024f7ea9824be563d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10192 bytes