Malicious PDF — malware analysis report

Static analysis result for SHA-256 7065deddaf92197c…

MALICIOUS

PDF

66.7 KB Created: 2020-08-05 00:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 937218313ed9f291e1b4953891730467 SHA-1: b8aae49b5ac31574924677dda8177251e5d078c3 SHA-256: 7065deddaf92197c3c7bea05e6035fcbb795c21e7517b1c7d26d7635759643f2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=oxidative+phosphorylation+steps+pdf', is identified as a malicious redirector. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=oxidative+phosphorylation+steps+pdf
    • http://zitijini.senbukankarate.com/uploads/1/3/1/4/131483337/welabos.pdf
    • http://files.adjoaoseipsyd.com/uploads/1/3/1/1/131164425/bepisix.pdf
    • http://files.oceaneyessupply.com/uploads/1/3/1/4/131437724/66b9928.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/89821614756.pdf
    • https://cdn.shopify.com/s/files/1/0433/4970/4854/files/26642147023.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2037/files/jofiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/zesuvelefebepopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2824/files/notedukobegutiwik.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/87974677163.pdf
    • https://cdn.shopify.com/s/files/1/0433/7536/2198/files/refozuwemez.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/giralimigorijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/85589592866.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/54013690172.pdf
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/sulul.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_off0000bdec.bin
fb02bb4b377bafb4d0a353a0d1fe104137b02dbbd3da84439de5ddfbbaac41d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEC 5384 bytes
font_01_sfnt_off0000d045.bin
ad666d8307977ee3656022333a4ad9b0499c1f8e3658536107fb6b243113ee67
pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 14832 bytes