Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e409cf1348332d0…

MALICIOUS

PDF

52.5 KB Created: 2020-08-10 14:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3acf948adbbc6a947b992b7887390b8 SHA-1: 6f96d58d5ba4bb90743998f7a2ba71b313045d90 SHA-256: 6e409cf1348332d09ce3ac7df1972f637a55567a25d46e5585558b88e8c2d21d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to the same redirector URL. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or distribute further 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/pify?keyword=definition+of+reading+aloud+pdf
    • http://files.curvaceousglamfashion.com/uploads/1/3/2/6/132681969/mefiboxugoguse_semaxutudaka_zolizijiwisog.pdf
    • http://files.thomasjcoppola.com/uploads/1/3/0/7/130775032/fotofixedaxa.pdf
    • http://navoge.zikhafrimainecoon.com/uploads/1/3/2/8/132816202/duguju-rezejusu-nusuk-vavaligadaz.pdf
    • http://files.shireendamghani.com/uploads/1/3/1/8/131872178/puzobezoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/89488861168.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/72718753749.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/71570715320.pdf
    • https://cdn.shopify.com/s/files/1/0429/3092/9827/files/89330671363.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/gelejaxaralutisosutogux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/76451542181.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7843/files/40595160539.pdf
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/josazotidoronakesem.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/24900910985.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_off00008cb0.bin
92754b19e910d9b4d611378d411dea355ece777d06ba905c81ba7465479874cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 5028 bytes
font_01_sfnt_off00009ddb.bin
42622800ec2d1fab03b7e1b7b659e70ac7b0093e7cb7f3f9cbbd9b0ac449d243
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDB 12400 bytes