Malicious PDF — malware analysis report

Static analysis result for SHA-256 06616d703add688c…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 05:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b7b7a554e4b15825188937d7b5f00f SHA-1: e28f17ccbc0ffdc424081b96c37dcf9f5aa0c1c9 SHA-256: 06616d703add688c40b752b375deae244022413b783a9dbfd46d873f8a2188c4
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is likely part of a link farm or SEO manipulation scheme designed to lead users to malicious infrastructure. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, aligning with T1566.001 (Spearphishing Attachment) as a potential initial access vector.

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=dev+beats+down+low
    • http://files.binghamsplace.com/uploads/1/3/0/9/130969580/dopodalisorojetuteb.pdf
    • http://files.criticaldrumtranscriptions.com/uploads/1/3/2/6/132680926/verapibuwubad-kejijuwob-jakat.pdf
    • http://files.fam-ilyproducts.com/uploads/1/3/1/0/131069978/414272.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9681/7312/files/19117051446.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/51815646109.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/jodozalomoxobozujopus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/xifupusopugixisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/nomuwusezesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/68144948692.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/90364947180.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/maxotipidolupami.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_off00007549.bin
a0e71df0bd290acd7ad3d1e9617e6fcdada7002626d02a23876edfb38c4e8585
pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 5012 bytes
font_01_sfnt_off0000867f.bin
11fd49e1c3e90cbc65207351086231eef1146a66f49da96f27f930877f1f8f68
pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 10180 bytes