Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3410b33b096413…

MALICIOUS

PDF

159.1 KB Created: 2020-10-27 01:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b8e499a37026cd8afbe990c0557f0b4 SHA-1: 2e58178b4cdcf2789b7dd63e5c13b9081cc304d9 SHA-256: cd3410b33b096413275de4bc4289a27c21852879ca8025ee166e50a7a8c9d0ea
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?keyword=i+don%2527t+always+meme'. This URL is associated with a payment redirection lure, indicating a likely business-email-compromise pattern. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://gettraff.ru/strik?keyword=i+don%2527t+always+meme In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f88534ff008e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f91caefca38d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f9447e566b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8db3f5ab4ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f8a0892beffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8e0cc477afd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f936dc2acbab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f893aa3e7cc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f90e0484185f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f94a3c7dc165.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/784014.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/vanibu_tufixegaj_varovididajudom_bubumibemiv.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/5227695.pdfIn PDF document text
    • http:///font]tibasicdev.wikidot.com/local-files/83lgfont/06h_LsqUp.gif[/img]Hex:07In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tulosa/15038473125.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/centuries_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/43366061804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0639/9916/files/rally_racer_drift_apk_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/8596/3940/files/monocle_travel_guide_bangkok.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F951 5040 bytes
SHA-256: 096d505a4aba2325a407b65094a219b65802b5784b78721af9df58196b753b04
font_01_sfnt_off00020a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A82 25724 bytes
SHA-256: 477a64c1430a3ab5e25c6e2d10a20e26198b2d00a030d9912e6ad47e96525f05
font_02_sfnt_off00025575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25575 17144 bytes
SHA-256: 7c1def785e3b9b3119d00bc0a9b5a3709d840798dd07c199947964d3721d2f2a

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