Malicious PDF — malware analysis report

Static analysis result for SHA-256 059bc5aecf5aaf0f…

MALICIOUS

PDF

35.9 KB Created: 2020-08-30 18:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9342920f27cbc7c40cdaee0a4dfa756b SHA-1: 56a35caa4a888329d184ba8ca7bdfa94516554ff SHA-256: 059bc5aecf5aaf0fd1df6eccd74b13d13b61efa3d66e511cd7ea3e12ed881f83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=maitres+pressure+cooker+manual'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and references to a 'pressure cooker manual', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=maitres+pressure+cooker+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6811/9453/files/moose_jaw_recreation_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/jixuzaritomutuxufuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/suwewofigutuvu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/75729599220.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/xadorimepomekeji.pdf
    • https://static.usrfiles.com/ugd/b8c837_34572aa648de458f823d9caeefdf3df6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/13340210992.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/33617645071.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/77262097055.pdf
    • https://static.usrfiles.com/ugd/0d9a50_6f7b3413817340858f46e75a1024d1ff.pdf
    • https://static.usrfiles.com/ugd/df4650_e27ec99f19b94c788d8c3a727bcc6153.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_off00004d8d.bin
a0a8ee91003e67d2445481a9fd02b790ea9365e62ca7160bd62b4790a667879e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8D 5148 bytes
font_01_sfnt_off00005efd.bin
bd785b230a5826d7ad6c18009c25992bd8fca3f11c3c9298a57ef388080a0783
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFD 10656 bytes