Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a15e840ea576c34…

MALICIOUS

PDF

47.7 KB Created: 2020-08-07 05:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86600b207f602eeb72ebd7fa9a239c05 SHA-1: 4b4c66a54fba0102aa452da093a97fed0d4c619b SHA-256: 0a15e840ea576c34cce0553fdec48f88ea6fdbc79f6626715a125cb40771062f
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=les+accords+de+camp+david+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=les+accords+de+camp+david+pdf
    • http://files.novelideasbylaura.com/uploads/1/3/1/1/131163898/merefazonofurof.pdf
    • http://files.davidevansracing.com/uploads/1/3/1/6/131637273/b7ff710.pdf
    • http://vevina.johntstephan.com/uploads/1/3/0/8/130814328/94821019.pdf
    • http://linexinu.devoncoast.co.uk/uploads/1/3/0/7/130775795/pevurogunufebisiju.pdf
    • http://turijaseb.teecardaci.com/uploads/1/3/1/4/131406950/9951812.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/poxumitewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/polycom_vxs_7000.pdf
    • https://cdn.shopify.com/s/files/1/0430/7137/3466/files/osrs_lava_battlestaff.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/remove_punctuation_from_a_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/assemblage_theory_delanda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/77876531244.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/the_enormous_turnip_activities.pdf
    • https://cdn.shopify.com/s/files/1/0429/0140/5852/files/skyrim_male_textures.pdf
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/sodilexamibojajibabaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/mikuni_carb_adjustment_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/2982/9544/files/pdf_test_file_20mb.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/paper_chromatography_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/aptitude_test_for_job_applicants.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_off000078a2.bin
3ac3f975f900a4789d884778437b64f9bfac785f9909577d8584471660b423da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 5268 bytes
font_01_sfnt_off00008a86.bin
fe65b62584dff6be4d3c4eed1ea0a5d1b8c25c95eef28c3927bca7e62abae795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A86 11880 bytes

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