Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1a657b60de7425…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 04:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 385ee239f198d0a3fbdcabff1dd106a1 SHA-1: a63f3e4cd9fd83a0f4bf94763e5106b4d87049e9 SHA-256: 1e1a657b60de7425c657e29791c736e185adbfbb3ffcd343f9a47f6e334f601a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Passport renewal nz forms' and the malicious URL, suggesting a phishing lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely part of a link farm to improve search engine ranking for malicious content.

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=passport+renewal+nz+forms
    • http://files.patriciacarriganartist.com/uploads/1/3/0/8/130814115/3eb0a0527e65da.pdf
    • http://towimuje.modelinstitution.com/uploads/1/3/1/8/131856827/9937481.pdf
    • http://files.minasabritabrizi.com/uploads/1/3/2/7/132741429/f235f7328680f0f.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/amoeba_sisters_video_recap_enzymes_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/xufalopiwowijejotutas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/wawanizipifevoratar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/10989746449.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/96839826763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/dimplex_fireplace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/98161460632.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/ecocardiografia_transesofagica.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c48.bin
3cd4fd6e849e62a060e7cf0d259e6d84168226146bab8ced90f10ba73e2fea2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C48 4932 bytes
font_01_sfnt_off00006d06.bin
800feb78058ea3df9fffa0c11e312682fc361fc0c8695d4392732e55bdc9cb88
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D06 10280 bytes
font_02_sfnt_off00009027.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9027 4324 bytes