Malicious PDF — malware analysis report

Static analysis result for SHA-256 e314286e46d3938e…

MALICIOUS

PDF

73.3 KB Created: 2020-08-18 19:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba86be56fa20ded1ae829fe6b94f24b SHA-1: 3b5cf09a4fb94a7fdb598f013465715d871148fd SHA-256: e314286e46d3938e9e7f74cc0f420d4d9dd7719a71ee182e83366b16c739a3b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of the redirector URL suggests an attempt to obscure the final malicious destination, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of direct execution behavior.

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.cc/pify?keyword=arcarum+gbf+guide
    • http://files.mpoilerhockey.com/uploads/1/3/0/7/130739415/3449328.pdf
    • http://razulu.jasminkwan.com/uploads/1/3/1/4/131453540/losojexafudoz_votukixotuto_pezasawabitinap_muxusiv.pdf
    • http://files.parrottlibrary.org/uploads/1/3/1/4/131454581/kepizoxip.pdf
    • http://files.foto4funphotography.com/uploads/1/3/1/6/131637254/lelalizisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/42367612091.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/algebra_2_chapter_13_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/73506454044.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/popegexasex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/ruvuvaviwijug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2678/4157/files/61966664054.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/zosujuzeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/fabeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/usps_change_of_address_form_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/bogizafatupobatupimeluwaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/xabogivun.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca89.bin
1579e06368e09908a1e01908b94e50f22932c7c69117c155a12b5bb0335e2a46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 7008 bytes
font_01_sfnt_off0000e208.bin
453d19f66a381aac4e33510c9efe986dbe88747bdd51798407c6f881e249647a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 5260 bytes
font_02_sfnt_off0000f3c9.bin
b9e566616966266510695aa4f0f780a887cfcd63dcadc2fdc1f59aae8499290d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 10684 bytes

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