Malicious PDF — malware analysis report

Static analysis result for SHA-256 6094127b70f0a065…

MALICIOUS

PDF

45.2 KB Created: 2020-08-23 17:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 408654f75c9dcb0d0632a7c14783b798 SHA-1: 2e6611fdf42be74aeb9e53e30a9b3caa3180f1a9 SHA-256: 6094127b70f0a065386a1998ee619176bd3496354a1baa1c618529f53c207c1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary malicious URL identified is a redirector that likely leads to further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm for SEO manipulation or malicious redirection.

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=learning+functional+programming+in+go
    • http://files.ourfrenchimpressions.com/uploads/1/3/2/8/132814448/8491536.pdf
    • http://jajuf.biocompositesgroup.com/uploads/1/3/1/4/131408024/bumosixolelidowoko.pdf
    • http://mamodow.scouttrout.com/uploads/1/3/1/8/131857054/e3669e802.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/vozezivuwusomeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4194/files/97561806716.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/97198299022.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/array_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/badminton_shots_and_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/9438/4546/files/90639421974.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/joxivalatijaposekilimel.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/bayesian_analysis_with_python_osvaldo_martin.pdf
    • https://cdn.shopify.com/s/files/1/0437/0769/5258/files/porsche_cayenne_2020_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2587/2549/files/60874816064.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7952/files/case_study_research_approach.pdf
    • https://cdn.shopify.com/s/files/1/0427/9743/2999/files/mechanical_reasoning_test_gears.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_off00007436.bin
a05385e486f65d6bc054aa17c786c4edfed2e570a50008f550d4f2a064569517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7436 5100 bytes
font_01_sfnt_off0000857e.bin
24f8745242ba92601268bb4813c0c9311c2f523be866c5c65869b4cca8b08564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 10120 bytes

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