Malicious PDF — malware analysis report

Static analysis result for SHA-256 70dbbecc3496c063…

MALICIOUS

PDF

42.8 KB Created: 2020-09-04 04:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d01e1502a951e1dd7825aa4c42a050fb SHA-1: bfd79c97b6238e463764fad0691d80ddbb958e63 SHA-256: 70dbbecc3496c063dccce2865bdfb8022b4131d11c7fd5bc7906e8e9a26dbc64
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/wix?keyword=ileum+histology+guide, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The presence of numerous other links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the overall structure and the malicious URL point towards a phishing or malware distribution attempt.

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/wix?keyword=ileum+histology+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/nikekevidavorokabozefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/european_guidelines_eosinophilic_esophagitis.pdf
    • https://cdn.shopify.com/s/files/1/0449/4550/6459/files/canon_in_d_piano_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/witibegavepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/28270655229.pdf
    • https://cdn.shopify.com/s/files/1/0460/1590/5951/files/68055852287.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/purorigekogobukite.pdf
    • https://static.usrfiles.com/ugd/409ca8_2be515e625dc43e1a137f007225ba788.pdf
    • https://static.usrfiles.com/ugd/5b604d_b0a6da54a4174f559e80176a46871d9f.pdf
    • https://static.usrfiles.com/ugd/8e7730_d3da65afded74e389462c6ce03a2aa74.pdf
    • https://static.usrfiles.com/ugd/52b593_0f13741769e94a819c55163f01898275.pdf
    • https://static.usrfiles.com/ugd/5c7528_9fe71857e10f4b8d87af801f2a8a32d0.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/60976333459.pdf
    • https://cdn.shopify.com/s/files/1/0431/1072/7842/files/ejercicios_resueltos_sobre_cuerpos_d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/48701379141.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_off00006a75.bin
3a2737bc6673e3bf729d2f498937e9b567e52b82c2d0758d7ac477fa88d2ff98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A75 4972 bytes
font_01_sfnt_off00007b42.bin
975473621985e1b7e02e934d53d5cb6924eff3d7722c2010dadccfccf088d318		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 10200 bytes

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