Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae472998e062948…

MALICIOUS

PDF

35.8 KB Created: 2020-08-11 01:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3acc063266d2c43cdc3f911deb2e8e2 SHA-1: 3ded44acad35ac1d59d5b00bf239ed573fe94b6c SHA-256: 5ae472998e06294814a8acb131ecd0806d3afc91c7f7e384b2ebb3756deca164
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate book downloads but redirect to a malicious URL. The primary malicious URL identified is https://ttraff.com/pify?keyword=basic+electrical+engineering+book+pdf+free+download+author+kothari, which is flagged as a known malicious redirector. This indicates a likely SEO poisoning or link farm attack designed to drive traffic to malicious sites.

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=basic+electrical+engineering+book+pdf+free+download+author+kothari
    • http://files.dubaiactivelife.com/uploads/1/3/1/6/131606284/8139295.pdf
    • http://files.sustainablesidekicks.com/uploads/1/3/2/6/132695556/godaxegarajid.pdf
    • http://gefinutat.rls-sciences.org/uploads/1/3/0/9/130969754/3692646.pdf
    • http://files.selfhn.org/uploads/1/3/1/4/131407898/9789875.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/27640284724.pdf
    • https://cdn.shopify.com/s/files/1/0439/7917/8142/files/ffx_dark_valefor.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/callanetics_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/nature_live_wallpepar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/analise_combinatoria_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/tatilupefevedaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/34693909507.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3910/files/anesthsie_tronculaire_dentaire.pdf
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/26415864798.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/45559301621.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/zozag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/sowatuxisojorolituwev.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_off00004aff.bin
ccd0dc4873f8d0de666fbbff3352c90ab66749a51a2db783b04edb33bd15d55a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFF 5760 bytes
font_01_sfnt_off00005e9a.bin
00a12d4f5e2e24e9b893b89305fbd9dc5848aa0f8336b8b9b42fd4a4774430ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9A 9764 bytes

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