Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8ca61dbdd80810…

MALICIOUS

PDF

32.3 KB Created: 2020-08-30 06:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf214098b86f084bc15b3b814b5e118e SHA-1: a9122e31220ee8e488d88e2648df1870a2cdf3e1 SHA-256: 0e8ca61dbdd8081094311c216961c1634cda06bbf42c6dc69c3aba75f541824e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, which is a strong indicator of malicious intent. The document body, though partially corrupted, contains text related to 'Anz cbig ig facility fee' and the malicious URL, suggesting a phishing or scam lure. The presence of a large number of external PDF links also points towards a link farm used for SEO manipulation or distributing 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.cc/wix?keyword=anz+cbig+ig+facility+fee
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/73cb9e_10cd00456f414ac2a4467424487da836.pdf
    • https://static.usrfiles.com/ugd/b8c837_52db3154e7c3442d9f3b20996c601b15.pdf
    • https://static.usrfiles.com/ugd/98e298_522439f311cb4006898cb28fc64556ef.pdf
    • https://static.usrfiles.com/ugd/e2c250_6c965c7b454e4ac3a0537aaaf99ba2f5.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/poxuzot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/vexufezigamasimuzap.pdf
    • https://static.usrfiles.com/ugd/b8c837_c575e52dff6f467181dd5c68f6159dc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_636df3f81567434b8f96819371890238.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/kubotov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/dolexinopodideta.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/future_probability_exercises.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_off000041b6.bin
421b52a787b9bba38a7c1b674deab9a7d8551b0c5c69fbeb3307010b3a4e9c49
pdf-font-stream PDF embedded font (sfnt) at offset 0x41B6 5056 bytes
font_01_sfnt_off00005315.bin
d8c847b378c7bc14777ef46d4d0b0a636ebb775836bc46464aa88badd3d42e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x5315 9876 bytes