Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a973a1eb9380d8…

MALICIOUS

PDF

236.7 KB Created: 2020-07-25 13:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea8200ddb20a41583fea8024bb6d07fe SHA-1: 19e20cf11ea414257f85775ebc8318080409f6e6 SHA-256: 85a973a1eb9380d83ffdaf71b16441ac6f72d9b81fba63580ac1f592598d47ac
142 Risk Score

Malware Insights

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

The PDF document contains lures related to advance-fee scams and urgency, aiming to trick the user into clicking a malicious link. The embedded URL `https://ttraff.ru/pify?keyword=stroke+fast+track+guideline+2018` is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of malicious links suggest an attempt to download and execute a secondary payload, likely involving client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=stroke+fast+track+guideline+2018
    • http://files.whizmeal.org/uploads/1/3/0/7/130739369/f30037cba12.pdf
    • http://files.rosieduttonphotography.com/uploads/1/3/0/8/130874403/5b366f.pdf
    • http://files.thaimun.org/uploads/1/3/0/8/130813616/400a355.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/36528816181.pdf
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/53461623906.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/xetuvom.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/pekupozagabazij.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/71553124048.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/vanokuwovowerigulig.pdf
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/tekirujifolobepiridizetus.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/53397693145.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/kiniwujevage.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/12848825077.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/lupivanebirerago.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/zajazi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/kesidipafemizafozom.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034fcf.bin
4fb5b79cee1e75473dbc7ed10e9c3e14289d95e2bfcc8ed30e9c5cdabd0c0afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34FCF 5760 bytes
font_01_sfnt_off00036363.bin
62456c8f56f01191f966069ef059b5c861ab3b50d8f701c9db43894e5f0a29b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36363 6644 bytes
font_02_sfnt_off00037519.bin
8fd9b011ac1073cce9b0ec39e911d5fcd82509de53ec3dff09276278fb78aa42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37519 15184 bytes

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