Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bb98e19a2baffd…

MALICIOUS

PDF

61.4 KB Created: 2020-08-09 22:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5297df794b71b38793ae0cf5bb9a11b7 SHA-1: b27966a138fb951350e4128925a4feeb355fc67c SHA-256: 03bb98e19a2baffd27d629d704082573a2b99caf8b30db950aaed7b7f64a7838
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to external PDF files, suggesting a link farm designed for SEO manipulation or to host malicious content. One critical heuristic identified a redirector link to 'ttraff.ru', which is known malicious infrastructure. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the heuristics and the embedded URLs indicate a malicious redirection attempt, likely to deliver a second-stage payload.

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.ru/pify?keyword=synthesis+and+characterization+of+nanomaterials+pdf
    • http://files.caitlindemeyere.ca/uploads/1/3/0/8/130874612/df4d54550cb3.pdf
    • http://files.edinburghlocalmod.com/uploads/1/3/2/8/132814306/3557251.pdf
    • http://files.wcsuticklab.com/uploads/1/3/1/6/131637570/fagemos.pdf
    • http://gijob.nfp-excellence.org/uploads/1/3/1/6/131636655/lilobubebeboxila.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/radodovisanare.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/18082330724.pdf
    • https://cdn.shopify.com/s/files/1/0437/0864/5541/files/kevuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/naliwafavatikumibafow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/saxununedalipasanazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/journal_bearing_failure_modes.pdf
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/92642003034.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/rubaxizaxitijerebif.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/inductive_and_deductive_approaches_to_research.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/d3_js_cdn.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/namakam_chamakam_lyrics_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/sowugab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.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_off0000b1f4.bin
0744404dab754c69015d194dc89bc65797b949138d54eb18841d102d2879991e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F4 5652 bytes
font_01_sfnt_off0000c515.bin
4e4277d84e75c85709508a9bd604e91eebe8b296c2bb0798c52fa1ae3ce15f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC515 10200 bytes

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