Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f2dbd2fa21acd9…

MALICIOUS

PDF

37.5 KB Created: 2020-08-01 17:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 160d3bd552a9bcf0ad9167ef414e46a2 SHA-1: 52d2f7d72ce13d8e0b4d4181dbaf08eee212aa65 SHA-256: 89f2dbd2fa21acd995467563f3a379ffb31dcd1876eed8589becfe12ea474985
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external domains, indicating a link farm or redirector strategy. The primary malicious URL identified is https://ttraff.ru/pify?keyword=briggs+and+stratton+500+series, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious links. No scripts were extracted from this sample.

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/pify?keyword=briggs+and+stratton+500+series
    • http://files.fieldhockeygoalkeeping101.com/uploads/1/3/1/4/131483031/legorunuzoperebeb.pdf
    • http://files.hannabroer.com/uploads/1/3/2/7/132710717/bijugejotekin_dajij_wadojoran.pdf
    • http://files.ceramics.se/uploads/1/3/1/8/131856584/jupirosar_wupasemode_vovoxe.pdf
    • http://files.wilcox-assoc.com/uploads/1/3/1/8/131856079/4662839.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/26832579791.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/84392090209.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/74265507155.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/busomufowuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/45878997632.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/xukuwekubudefepofevazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/39631722434.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/xavikusugufodadefixivaxif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/8589347037.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/evolution_joe_manganiello.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/4704146550.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/45405235707.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ce.bin
42be024e56102e1fce5fff53a9ff012a1c211975d2111e0214f422415723b0b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CE 5276 bytes
font_01_sfnt_off000065cf.bin
c3a7d286400c5db329d4bb4b139d8fe5c1e90261e1076089698be21e6b0ddaa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 10192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.