Malicious PDF — malware analysis report

Static analysis result for SHA-256 197bc6703cae255c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-05 02:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fd78419922ba1a8108ff4dd7392086a SHA-1: d8c7f90556a0ac762d3f8a13508c889ea9ccd881 SHA-256: 197bc6703cae255c42174d5641b1f4b5df13aa0d4c6ec3ab75e46c8f236cd25e
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a dictionary download, which is a common lure for phishing or malware distribution. The link points to a redirector, indicating an attempt to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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=oxford+dictionary+english+to+urdu+free+download+2020+pdf
    • http://files.noahkinsey.com/uploads/1/3/0/9/130969357/japavanixufure.pdf
    • http://files.samndoesart.co.uk/uploads/1/3/1/3/131383493/c2dbe6c.pdf
    • http://files.runningramsteam.com/uploads/1/3/1/4/131410012/rutumuja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5046/6464/files/21793241086.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/43278630346.pdf
    • https://cdn.shopify.com/s/files/1/0438/3070/6333/files/romirazosutabigunulox.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/3282940602.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/xisixopixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/sulajujeradop.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/14266038014.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/skyrim_risk_rules.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/62968513326.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71482320097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.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_off00006656.bin
df07781163f29a6816eb846a110e9f2032b1770d72a8e823d27ee739051ebbc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 5980 bytes
font_01_sfnt_off00007ac8.bin
6e1f9441e40ed02002af7b1b63a9f881ac5a095f95c1cd561b62e33d4325e488
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC8 10300 bytes