Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac62d7de5cee4af8…

MALICIOUS

PDF

51.2 KB Created: 2020-08-26 13:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24daa5acd0b605906291209f3e9b5643 SHA-1: ddb26c1c8c88fbcb315b15c3791125c41f396d54 SHA-256: ac62d7de5cee4af832e8c03f48ab010deeb215ac4997e6e23adaca4258becb05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.cc. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body was largely unreadable binary data.

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=dsm+v+trastorno+de+personalidad+anti
    • http://sunak.luckywin-autoparts.com/uploads/1/3/0/8/130874289/2901248.pdf
    • http://files.thenappyworkshop.co.uk/uploads/1/3/0/9/130969209/3146446.pdf
    • http://files.xquisitebalance.com/uploads/1/3/2/6/132681769/462df3ceb11006.pdf
    • http://vobinole.delightyourspirit.com/uploads/1/3/1/4/131438405/xitatukodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/1216056818.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/68861013392.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9673/files/boxubiwuzefezudawut.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6635/files/38992990788.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/58188560239.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/sifitav.pdf
    • https://cdn.shopify.com/s/files/1/0439/3733/3406/files/60596479498.pdf
    • https://cdn.shopify.com/s/files/1/0434/4768/1191/files/54729933072.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/52981336200.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/vexukixas.pdf
    • https://cdn.shopify.com/s/files/1/0433/1628/1512/files/income_tax_challan_281_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/93866232688.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_off00008642.bin
726f69ad84bf8cef828811660432af4602c5b0323dc290c61073e05f5d344875
pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 5164 bytes
font_01_sfnt_off000097ba.bin
4293f97edeb0d223d2516e10597f987982e4eb2970015ab736777114a031d3ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 11784 bytes