Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecf9ca92801f73a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-29 02:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cf79c540c24f6a63fd72ba467622acb SHA-1: 68c978c59b362e240e9d1fd31ab0d9f616c1b95a SHA-256: 5ecf9ca92801f73a6007d0f56638369e352223c7c7f5c49373c46416ba62bc03
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains this URL and other URLs pointing to Shopify, suggesting a link farm or lure. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure.

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.cc/wix?keyword=technical+communication+14th+edition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/onboarding_plan_template_doc.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/64306844215.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/liste_adjectif_allemand.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/baxaruxepogevebojus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/63081817952.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/69828181736.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/wobakivejudebadolese.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6c68ede7ab4d0985bd823f7434ac85.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e3a1a91089740da936be81dd4e13c1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_915fbe5ade9346ce8f67f7844ead7270.pdf
    • https://static.usrfiles.com/ugd/b8c837_30f19c0fba7248dabc7a34a6b1cc3b44.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c796b503fd54b86b32d3ac174f65c48.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_off00007654.bin
bc0e767452f81b789d1c9fedd407c5d256f881422f3f1074aad5c4ccb16080ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 4996 bytes
font_01_sfnt_off00008723.bin
499f6d69bfba5514f9490546fb704013079ae26abddd381ffa28caad40e26f86
pdf-font-stream PDF embedded font (sfnt) at offset 0x8723 10352 bytes