Malicious PDF — malware analysis report

Static analysis result for SHA-256 5faf664f0068eece…

MALICIOUS

PDF

40.6 KB Created: 2020-09-30 00:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ebd778512cf5b740a8aad503da2b1a4 SHA-1: 11ef54e99618221e9c7d43ba441d980b0a0539d6 SHA-256: 5faf664f0068eece87c2b73b3917887813aaaf5fa1a547215081a817c0cb2b44
162 Risk Score

Malware Insights

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

The PDF contains embedded links and text suggesting a lure for downloading an 'air waybill'. One of the primary links, https://gettraff.ru/strik?keyword=air+waybill+pdf+download, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/strik?keyword=air+waybill+pdf+download
    • http://files.thpulse.com/uploads/1/3/1/4/131455543/levozide-bowud.pdf
    • http://jomovev.newtonblades.com/uploads/1/3/1/6/131637372/2960973.pdf
    • http://files.lauramckaigpt.com/uploads/1/3/1/1/131164460/9502374.pdf
    • http://todemov.prodajproductions.com/uploads/1/3/0/8/130874284/7663845.pdf
    • http://files.alexandrudina.com/uploads/1/3/0/9/130969373/xizorofopezuvet-bujekopule.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/364730e9-c9e0-4ea6-8f24-4900ca8d19c1/16439692240.pdf
    • https://uploads.strikinglycdn.com/files/c668246b-bb61-4ef5-a066-318e74677e69/befotamekitijukamaziviw.pdf
    • https://uploads.strikinglycdn.com/files/9bc59a68-1923-4eb9-bb83-d9092909e535/biwipafot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/gikafesomolusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/bolobofoteliw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/11104372005.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/gomavujajonemobirini.pdf
    • https://cdn.shopify.com/s/files/1/0431/7606/7228/files/renigogorim.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/43855813815.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/blackboard_collaborate_launcher_mac.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_off00005fa6.bin
fb55627da0eda8b8c0ba7755b83ea3b9b95a9a1be54c56e86bf9600fba8e275a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 5180 bytes
font_01_sfnt_off00007168.bin
5928679733b615eb0100f90fea604b16bbe92a43206d0a5d41f4aeac7527b11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 10752 bytes

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