Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e95ff7c1f9f153d…

MALICIOUS

PDF

48.4 KB Created: 2020-07-20 23:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceb5189c38f0003cd1acbe619d7421bd SHA-1: 44c5a6eb0ee567dd17d41cf24c17e03c45f960cd SHA-256: 2e95ff7c1f9f153dfd05697cce87e51ade8dcdb72e8db76f8f6a38bc48197408
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm pattern, with numerous links to other PDFs hosted on platforms like Shopify and WordPress, suggesting an attempt to distribute malicious content or lure users to compromised sites. The ML classifier also strongly indicated maliciousness.

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=vivitar+aerial+drone+manual
    • http://files.jinhui-mechanics.com/uploads/1/3/0/7/130740252/9dd1fa0be676.pdf
    • http://files.aahahandwriting.org/uploads/1/3/1/4/131454383/kulazojapulikabaxe.pdf
    • http://files.drgordonself.com/uploads/1/3/1/0/131070144/8905244.pdf
    • https://nezikip.files.wordpress
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/5200368175.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/16824869063.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/finaluzikovave.pdf
    • https://lurufoduge.files.wordpress.com/2020/07/20519858702.pdf
    • https://bewutorabat.files.wordpress.com/2020/07/dazedulefopa.pdf
    • https://nezikip.files.wordpress.com/2020/07/96299576966.pdf
    • https://winasetuto.files.wordpress.com/2020/07/57617213169.pdf
    • https://sanolosu.files.wordpress.com/2020/06/nokavonadojovitamuwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/77841674414.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/pizuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/vomojafogega.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/4925455360.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/23592353699.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.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_off00008154.bin
c6eb2466998ee252c3e00093c5278dcb28123e483fe81faf105ffacd24e67683
pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 4700 bytes
font_01_sfnt_off0000912f.bin
262772f16305bebcaf6c6b4f66dec2abcefdd30bfdb508cfc2079cf5bc8a4ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x912F 10424 bytes