Malicious PDF — malware analysis report

Static analysis result for SHA-256 104b6652f55afe56…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 11:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5698484d4c5ee8419ad210d3c340358 SHA-1: 36696941384a8fd1717fc9f75b4625e6444cb15f SHA-256: 104b6652f55afe56c94de5ed6e8a5606cae11175b430c4887dc22af12e321f36
194 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many of which point to potentially malicious or SEO-manipulated content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The presence of a redirector URL suggests an attempt to obscure the final malicious destination. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings, indicating a likely attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=sunken+temple+wow
    • http://files.morrismindfulness.com/uploads/1/3/1/0/131071043/43e7a4c989b.pdf
    • http://files.solivitabookcircle.com/uploads/1/3/1/3/131379236/ruleb-virugig-timalat-tubiredezolurex.pdf
    • http://files.naminggraceinthedomesticchurch.com/uploads/1/3/0/8/130813799/cc34cb.pdf
    • http://files.nwmissions.org/uploads/1/3/1/8/131871740/wugewema.pdf
    • http://files.whitestole.com/uploads/1/3/0/8/130814402/6606813.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/36516808364.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/sesibogojapiwirubidofema.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/78265184146.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/pabimutosu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/vegifine.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/julaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/monolezavebe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/padixuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/manual_crown_vic.pdf
    • https://cdn.shopify.com/s/files/1/0434/8064/5782/files/wukupakarusemez.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_off000066b7.bin
54cee540edf1dbe03896c6ec1ad3c8260e4be6815c7b8be8e742f423e44a8761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B7 4740 bytes
font_01_sfnt_off000076df.bin
2747e65a36034f27d015c3e314b68c317d6e8507b247c0923c2360409ca56657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DF 10064 bytes

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