Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c53417baf2516e6…

MALICIOUS

PDF

108.9 KB Created: 2020-07-25 16:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6636182710102b72bcb2b5cc7d6ed7f9 SHA-1: d5e3dc05ff916d6ed7c1f9a40c8195797f794080 SHA-256: 5c53417baf2516e654924b01873fc3f4232d07165d7006cba6fcdc61c67658af
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious sites, potentially for phishing or malware distribution.

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=ck2+monarch%2527+s+journey+guide+chapter+3
    • http://files.mjohnson7.com/uploads/1/3/0/7/130739060/lerisutelizatetel.pdf
    • http://files.jamestowncooperage.com/uploads/1/3/1/3/131398094/gamiwi_pavusolapuv_sutukoxutiwobo_xezasik.pdf
    • http://files.benrosenblummusic.com/uploads/1/3/0/7/130775918/7680122.pdf
    • http://files.rsq-d.com/uploads/1/3/2/8/132815181/nevuvemitof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/faliwep.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/sefurabolepirob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/22476220345.pdf
    • https://cdn.shopify.com/s/files/1/0439/3477/7499/files/ratogozenujopefeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/20690943691.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3570/files/74824900400.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/5964007484.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/tesatefabomitadixubazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0362/files/19061657982.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/tetow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/63005583614.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/69684285885.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/rivanesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/4046190956.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_off00016e23.bin
db44adede695d826c16ecb7ee3515bbad8a7a1b10257d41553c190b567b151b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E23 5932 bytes
font_01_sfnt_off0001823c.bin
8ab617ea23473bd067444f3cc93c9d659a622777563801442718904af7ce5343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1823C 10404 bytes

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