Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5674d1dc34e212…

MALICIOUS

PDF

271.5 KB Created: 2020-08-09 06:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cb8b48754a52eac5814f3908fd703db SHA-1: 3acd5da3f89fe7d786a69cdfd8335637e5949f49 SHA-256: 6c5674d1dc34e212950ffb575689c5cbef563d3b314bacb18fe187cf34c6b135
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of a malicious redirector link suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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=warhammer+40k+orks+codex+8th+pdf
    • http://xijunu.skiistowest.com/uploads/1/3/1/8/131871699/bedolopawuja.pdf
    • http://files.thehappyhigh.com/uploads/1/3/0/7/130775704/libozep-zukofuf-xatej.pdf
    • http://rufipotet.leadershippasadena.org/uploads/1/3/1/0/131069934/taniridawa-rowarokinavik-valulixa-motakagup.pdf
    • http://sonemazi.birdonthewallphotography.com/uploads/1/3/1/4/131437657/81c0f42a49b7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/zevilikuwibad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/91307430937.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/jilabujutolaxirogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/sesebixatoju.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/15182194246.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/synonyms_and_antonyms_worksheets_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/insect_jelly_rimworld.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/33633695234.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/mazazidegafazimawito.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_off0003f539.bin
5ab015ac50d31d3a2f14016c64fe85afd9b38d73589d673f36431ec89f517f31
pdf-font-stream PDF embedded font (sfnt) at offset 0x3F539 5932 bytes
font_01_sfnt_off00040958.bin
9a8df06d60d37cd16834f989793782e607daeb9e8d460e0a03b69cf3ba49a05b
pdf-font-stream PDF embedded font (sfnt) at offset 0x40958 11616 bytes