Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8cd7e13e2ccc76…

MALICIOUS

PDF

121.6 KB Created: 2020-08-02 23:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ba391395bca19c2aad270ce1b1bfb12 SHA-1: e57e08caf58548e2cacd341fa9acff1f59cd2766 SHA-256: 6b8cd7e13e2ccc766b56cadb94542ee930c76b59d3f06324d5ef7510cc55368e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that contains a large number of external links, many of which point to PDF files hosted on Shopify. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=ingersoll+rand+compressor+manual+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'ingersoll rand compressor manual pdf', suggesting a lure to trick users into downloading or accessing malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates this is part of an advance-fee fraud scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • 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=ingersoll+rand+compressor+manual+pdf
    • http://files.businessdesignservices.com/uploads/1/3/0/7/130776646/livepoxozoz-jazevivorujomi-wimoboxoxa-fuxaf.pdf
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdf
    • http://files.montessori-lomas.com/uploads/1/3/0/8/130874146/wanepoxopagupi.pdf
    • http://files.honestskilledgaming.com/uploads/1/3/1/1/131163761/22a3d52d9.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4658/2944/files/gedidifabigidiloses.pdf
    • https://cdn.shopify.com/s/files/1/0433/5285/0586/files/30189229304.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/64815116614.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/media_queries_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/hayward_multiport_valve_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/read_or_die_ova_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/82432452021.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3208/files/vamiwofapewenapokowexunud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/punamakunegededodabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/kevivezodubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/93840125436.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e8f.bin
8acdbaefaeae56c06b6df3bb86b8524d90693cb73a32427cdfc3908c156eb359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E8F 1712 bytes
font_01_sfnt_off0001866a.bin
ed5522d9ff42a37d6e6f673faa5add6e7753bf1656a4da4f20af130231b789c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1866A 3192 bytes
font_02_sfnt_off000191c9.bin
daed9bbf9c49f33021f49227617c3e6cc11e5926a69737d02704e09e389e7d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x191C9 5412 bytes
font_03_sfnt_off0001a41f.bin
e11f78ecf9b98204ab37e017564273e93ceb4be4398fef6b99beb85f3bf1cc54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A41F 16964 bytes

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