Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf19f096916632c…

MALICIOUS

PDF

34.4 KB Created: 2020-08-18 18:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39d0b0d61a3c9f08232106bfb67be87f SHA-1: 06ae415173345f13d40f59d945915c31f16700dd SHA-256: faf19f096916632cad92efbad95e8f16ac1b4e7ba8d9a5d50409fad25e2bcbc1
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/pify?keyword=synonym+for+information+sheet. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm or redirection scheme designed to lead users to malicious content.

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=synonym+for+information+sheet
    • http://wipalo.thriveflinthills.com/uploads/1/3/1/3/131398404/7900712.pdf
    • http://titejisa.wewillcureals.com/uploads/1/3/1/3/131379732/b6cba73a12c9.pdf
    • http://geretaze.ganaraskaglow.com/uploads/1/3/0/7/130775203/boxobiwiv.pdf
    • http://files.peacecitysoaps.com/uploads/1/3/1/4/131453288/5724583326bb59c.pdf
    • http://files.rutherfordmemorialumc.com/uploads/1/3/2/3/132302855/walalebavepal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/kowapadavovewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/29869022653.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/fugesojexibetekujeza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/rokumavidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/guggenheim_museum_bilbao_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/bodukeruriruxanalegepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/ducksters_renaissance_crossword_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/25172442237.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/47656317493.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/jonenibuposikide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/komidadesewibos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a3f.bin
4892a6177e4fc52bcbda1aad52b8489226725969ee7fa2688dde2bae724835e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3F 5180 bytes
font_01_sfnt_off00005baa.bin
b29aeefc2e884fd02488cdde24c79d8e8f2106b4e2938ffaf45b6b0f98801246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAA 9700 bytes

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