Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6613d10b078915…

MALICIOUS

PDF

42.7 KB Created: 2020-08-21 11:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97361de779cae8992a7c865d5aa962ed SHA-1: eb0c2bc1d88bda3c33681ee2371eafd6eb9b02cb SHA-256: 5d6613d10b0789151692dce5175c9da0147e752d3b73bb1b7b971544a32a9a53
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, contains text referencing 'Indycall app for android' and includes the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous embedded links, many pointing to Shopify domains, further supports the SEO link farm heuristic, indicating an attempt to generate traffic or distribute content through a large number of links.

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=indycall+app++for+android
    • http://defori.eastshorechurch.net/uploads/1/3/0/9/130969873/b550b.pdf
    • http://files.dollysgallery.com/uploads/1/3/1/3/131383207/3ad79961b0.pdf
    • http://vivame.harrisonandellison.com/uploads/1/3/1/6/131606490/gibonuvireja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/lupos.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/54375395958.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/83820569502.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/rufene.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/zubejupelupasexivejebasuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/1918/7862/files/casting_call_poster_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/rogovosuwopuvifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/91818119347.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/36922746906.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7428/files/42250590459.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/kinulonad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/metikerorufagavikenev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/arduino_genuino_101_datasheet.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_off00006a0a.bin
65f38cd8d0b88b30289aae1cf1a00e3225c706072646eb0231282771abdcd9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0A 5012 bytes
font_01_sfnt_off00007b24.bin
f0c6cf459886426f934f520b43ea1c4e2788a44a769bd8c5141e621bce67ae30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 10120 bytes

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