Malicious PDF — malware analysis report

Static analysis result for SHA-256 74103575ce34f1e5…

MALICIOUS

PDF

49.1 KB Created: 2020-08-18 22:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19116500c5c6cbba2dfea277b7db5e64 SHA-1: fb239407a62d23deeb0f967f8d7dd3af7cb027a4 SHA-256: 74103575ce34f1e5698958928fc62a41bbf4afd9eb92948025d24c3c12864310
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The ML classifier strongly indicates maliciousness, and the presence of a link to 'ttraff.com' known for malicious redirects suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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=butterknife+android+studio+3.+1
    • http://files.postyguys.com/uploads/1/3/0/7/130740391/veloduzi-roletepiruram.pdf
    • http://files.berksdogtraining.com/uploads/1/3/1/4/131452976/e72da7e3d37.pdf
    • http://files.parnellclothingco.com/uploads/1/3/0/7/130775528/327b06e0de.pdf
    • http://files.readyforsuccesskits.com/uploads/1/3/0/7/130739570/xonosegox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/virology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8162/files/aluminum_electropolishing.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/dizufaluxoseki.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/61102751515.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/85464340422.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/carcinoma_de_clulas_escamosas_de_la_piel.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/gba_rom_set.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/tidofizutudeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1285/files/webbie_savage_life.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/76975735634.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/9651920139.pdf
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/vepebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9127/files/vetebajowowojoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/72592152751.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_off00007477.bin
67d3b478c4d5f4ca5e7dee3bb89bb4f7723f426a332fb20667cc2706ab218187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 5228 bytes
font_01_sfnt_off00008660.bin
3abcf44abc3bc6dee3ecfd70e3c21214826b8de21f628da4b904c1a0a4e2f035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8660 14932 bytes

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