Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad8eb27607038f5…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 18:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7a6c86ce903c102ccdd15ef637e963a SHA-1: 2509ff05ce341a041fc081580ee0d8efdab0adb6 SHA-256: 6ad8eb27607038f5a1a53b983de326ed4b84f00e9a6579f28751080531a8f1ac
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure. The presence of numerous Shopify links, while mostly benign, suggests an attempt to blend in with legitimate content or potentially host further stages.

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.com/pify?keyword=kali+amman+bakthi+padalgal
    • http://files.sandrabullocksmith.com/uploads/1/3/0/8/130814308/20d53a0bd455d8.pdf
    • http://bufazi.finnmerican.com/uploads/1/3/1/1/131163729/feniruxezodewozuboke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/76179237871.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/nafabaxidasoviloriraj.pdf
    • https://cdn.shopify.com/s/files/1/0462/5901/1735/files/business_cards_free_templates_printable.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/china_visa_application_form_philippines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/75726012558.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/39230772035.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/terminator_4_movie.pdf
    • https://cdn.shopify.com/s/files/1/0450/2549/3150/files/einkommensteuererklrung_2020_anlage_n.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/33453100581.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/vurefibuxudixa.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/calendario_2020_novembro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/40529387002.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/dawevebivagasijuxiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/83143471728.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_off00005190.bin
4465bc778d15f3b712174f0983f4caa9b9ecbcb673d13b56278dc6e9e9efaf7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5190 5272 bytes
font_01_sfnt_off00006346.bin
a0e4949a3ae4007b2e7db870929e8ba459381209804774f6e78535d4a66c5918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 14324 bytes

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