Malicious PDF — malware analysis report

Static analysis result for SHA-256 669a6c7028cab10d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 13:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5717d2e3192261fca6d7b3c26d9c41f3 SHA-1: 6c82abae882332c441889c708ce6a3c932eb8e2d SHA-256: 669a6c7028cab10d81ba0c7aa7e0fd31ab16d8db8eb3eede5e0138a736873cb8
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, pointing to `https://ttraff.ru/pify?keyword=alabaster+box+lyrics+pdf`. This URL is embedded within the document body, disguised as search results, indicating a phishing or redirection attempt. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.ru/pify?keyword=alabaster+box+lyrics+pdf
    • http://files.honoraryislander.com/uploads/1/3/1/6/131606730/485963cb532edd.pdf
    • http://files.laughingkookaburracottage.com/uploads/1/3/0/7/130740553/3294572.pdf
    • http://files.thegreatwines.com/uploads/1/3/1/1/131163841/posawinuboju_bekazuje_suwapomot.pdf
    • http://fabawe.2ndusss.com/uploads/1/3/0/7/130739835/tovotuxefo.pdf
    • http://files.protectthegame.com/uploads/1/3/2/8/132814958/63b927.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/spiritual_and_scientific_research_on_arabic_letters_and_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/poribobigodexigexaxosite.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/mountain_view_dmv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/figujivarur.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/kesadovafegapos.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/sotuzovidakapolebenalex.pdf
    • https://cdn.shopify.com/s/files/1/0438/6983/1323/files/nothing_else_matters_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/27191312931.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/86491067329.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/milevajadilogegapufakona.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/39471483437.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000545c.bin
6c7409487366611ec70efe58420e385b46c20b5100222ed91a5afe68d2a18776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545C 5448 bytes
font_01_sfnt_off000066ef.bin
e0b89096584347e52b57f83853f0b6b1c36f7730ae55666c4072943a54e9798a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 7412 bytes
font_02_sfnt_off00007b6a.bin
637bd285087d79497c7b15f4ea73d69ab3a6e453d8ba5bd677d690f2e785e7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6A 9280 bytes

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