Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e8729fed28122c…

MALICIOUS

PDF

38.2 KB Created: 2020-08-01 09:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8236eaab6778a662103dda9aee4104a0 SHA-1: b169bd2f7709246f5ea1d995b3d2a6f30fc9f50a SHA-256: 64e8729fed28122cc844b46ee4f49426743c228e1fad9bee77c1f3fbac544599
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits a PDF link farm heuristic, suggesting an attempt to distribute or link to numerous other documents. The embedded URLs, including the primary malicious one, are indicative of a phishing or malware distribution 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.com/pify?keyword=prime+loops+torrent
    • http://files.24hour-electricians-bridgend.co.uk/uploads/1/3/2/7/132740515/giruk.pdf
    • http://files.mattmtong.com/uploads/1/3/1/8/131856956/vofuvof.pdf
    • http://files.blumoondesignsjewelry.com/uploads/1/3/0/8/130814043/c849c871aad2ec.pdf
    • https://primeloops.com/drifter-dusty-lo-fi-samples
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/78691601719.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/96701948665.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/10704732482.pdf
    • https://cdn.shopify.com/s/files/1/0434/9716/0866/files/dumoxapel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1046/4667/files/62142618294.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/80558796699.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/fibedazomebodiwumadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/24153911637.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/corporate_resolution_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7606/files/22830046063.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_off000058c7.bin
7a2a16d8100f3c45f727009563551e8f486d3e47e7666d52ff39bae375e91f7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 4756 bytes
font_01_sfnt_off000068db.bin
07b8cb813effaf276131205a847c034da03c1e332eefc2da3d23fa09f29874ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 10420 bytes