Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d26d8e670a91447…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 21:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2866725e86d9818abe1d338de47978f5 SHA-1: a93831ed03ef2e1706c2acae0dfa1d08d25f1a63 SHA-256: 4d26d8e670a914472cb66ef113016dbf5ccd2f143787b422dbd04417cb25874b
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including a critical redirector link to ttraff.com. This indicates a likely attempt to lure users to malicious sites. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous links strongly suggests a phishing or redirection attack.

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/wix?keyword=fox+like+dog+breed
    • https://static.usrfiles.com/ugd/bdeb4c_2a9982e0c2fa4584b7b06a0151f6059c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://static.usrfiles.com/ugd/b56239_45243ff57bf84d299517c5287c64bf1a.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/kuzined.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/83880542114.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/30113780224.pdf
    • https://cdn.shopify.com/s/files/1/0457/7551/9910/files/34899449592.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/68577775659.pdf
    • https://static.usrfiles.com/ugd/b6edda_908b85bf11004dc4bdd3a40012aa049a.pdf
    • https://static.usrfiles.com/ugd/e3834b_5f105ddf065446b6b16f2c1c115f4ebe.pdf
    • https://static.usrfiles.com/ugd/738632_1617d74042934c248636452479fc9a36.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d6d05ba13cc4be48b865d1ca7e988b5.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_off00006329.bin
5f53a1b753bc961352da5ff0a1646d7c53bbbb7ab90f5686762be95a0dd95223
pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 4832 bytes
font_01_sfnt_off000073af.bin
0ccebc100e66301605484c03a64788609bd091eec8594a780beb4157bc72246f
pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 10312 bytes