Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eacb3c2223f7e1…

MALICIOUS

PDF

45.0 KB Created: 2020-07-29 17:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8020b9e0ebacc0f9596dc3ac53e24748 SHA-1: 5c4b83a4d72de07db25cdd8add58d818ddeffc34 SHA-256: 63eacb3c2223f7e10de8714277ef1d8210b3445ef49977426d61d1179b8c0599
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=strategic+management+fred+david+17th+edition+pdf+free`. It also exhibits characteristics of a PDF link farm, embedding numerous links to other PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the embedded URLs and the nature of the link farm suggest an attempt to manipulate search engine results or direct 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.com/pify?keyword=strategic+management+fred+david+17th+edition+pdf+free
    • http://files.kimbuckelewart.com/uploads/1/3/1/4/131407549/7632968.pdf
    • http://files.sandraclarke.ca/uploads/1/3/0/7/130776823/pirajox.pdf
    • http://files.baroquecelloproject.com/uploads/1/3/1/4/131452735/gijazet-paxupame-jufiwowuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/99735347105.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/29572322667.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/xejosugifefawevarevetadaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/73806810325.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/loxofotapomawofaretiwaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/jegorosef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/gakipalabunavibokivojas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/70584906312.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/sunopugino.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/rinuxerixob.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/vokipetenixumejobitifek.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_off00007142.bin
b22883807adb13e714f5dad2019357b236253047740efe0254ff5919411c8d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 5444 bytes
font_01_sfnt_off000083a4.bin
837fafc29c1d3ce1aa0c934696438cca262872abd7423f096544df4524d0f710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 10272 bytes

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