Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c296e152cd039a…

MALICIOUS

PDF

64.1 KB Created: 2020-08-31 03:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1c20a3504eb44517a811b40b574e53f SHA-1: 11fe0db8efafced1e71450ddb8e1a8d4d66049d8 SHA-256: 44c296e152cd039a43b19b57b6349e0e36627e4394e6a78824af06dec4336f43
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One of these links, 'https://ttraff.cc/wix?keyword=jakes+murder+divinity', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious infrastructure.

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/wix?keyword=jakes+murder+divinity
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/17165440704.pdf
    • https://cdn.shopify.com/s/files/1/0463/0275/7021/files/nasagufunubelilunojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/75370076062.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_4fd1226e87eb46c49d9b37e2126e8b04.pdf
    • https://static.usrfiles.com/ugd/fd3290_b09d4729553746038b46c8498cb3c58a.pdf
    • https://static.usrfiles.com/ugd/913720_8acb04ec689d48e19ed6bf7c6be7708c.pdf
    • https://static.usrfiles.com/ugd/271e65_df8544f2fc564eb9ac0bce0688b26f42.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/thank_you_letter_for_teacher_from_student_sample.pdf
    • https://cdn.shopify.com/s/files/1/0437/9367/8493/files/91704772377.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/46608468810.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/pexigepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/ramobuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/7591/0294/files/elementary_linear_algebra_larson_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/bullying_acoso_escolar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/nivebafixi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0f4.bin
a002361222b0a984b3e4574dc37d8aeed2a7f980fe1a5999b46b60f520b0f5b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F4 4928 bytes
font_01_sfnt_off0000c19c.bin
35f83eb6b34c0f1cad2346d518ab68e5a7896808d288dd368a9601d683799b1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC19C 10364 bytes
font_02_sfnt_off0000e4ec.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 4324 bytes

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