Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0056f7fc6a011e1…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 11:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 145f674c6895704fc8bca27fa3a8b13a SHA-1: b6472ac50c907beecfa72718a22b116a527b1c68 SHA-256: b0056f7fc6a011e1d8b5d8c062fad94467303a052935dd1e7569532f6a7f4ab2
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a link farm of SEO-optimized PDFs hosted on Shopify, suggesting an attempt to manipulate search results or distribute malicious content through seemingly legitimate channels. The primary malicious IOC is the redirector URL, which likely leads to further malicious activity.

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=attributive+adjektive+%25C3%25BCbungen+pdf
    • http://files.jasonhalf.com/uploads/1/3/1/8/131856234/5160756.pdf
    • http://files.praxismartialarts.com/uploads/1/3/1/1/131164100/dorifawosiduta.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/73801826900.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/stardew_valley_best_item_codes.pdf
    • https://cdn.shopify.com/s/files/1/0463/2861/0971/files/9831890705.pdf
    • https://cdn.shopify.com/s/files/1/0438/4296/1570/files/aktuelle_burger_king_gutscheine_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/94419077604.pdf
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/17761908907.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/pdf_editor_online_free_add_pages.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/56291471364.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058d4.bin
9ad84ad992cc214286e65fc7870ab4944077dfdf5754a868d34037992c59a063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D4 5448 bytes
font_01_sfnt_off00006b49.bin
0a7fef7525134d7822dc01c7b6411ec81f0234347c2ee642e8e64a040e165287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 10652 bytes

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