Malicious PDF — malware analysis report

Static analysis result for SHA-256 76194bfc9cc22e78…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 03:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ac4da45b8da43697de936577403e97 SHA-1: e5965c2313e84e71da3c6d92261a06d7f85047d9 SHA-256: 76194bfc9cc22e78db14015ebceaa8cc98e5ede7956d0c4dd5774fd49d5a75fc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The presence of a link farm and a malicious redirector strongly suggests this PDF is used for phishing or malware distribution.

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=browser+pc+free++windows+7
    • http://nogajozo.oaklandcabinetcoatings.com/uploads/1/3/2/7/132740930/rerawejamuvemap.pdf
    • http://files.worthitexperience.com/uploads/1/3/1/6/131607827/tosiwozotowagirixe.pdf
    • http://dolote.brockenhurst-station-taxis.com/uploads/1/3/1/8/131857120/lavabuguxut.pdf
    • http://files.onesource-ph.com/uploads/1/3/1/8/131857315/5f35e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/3246746507.pdf
    • https://cdn.shopify.com/s/files/1/0462/0097/9606/files/hannibal_movie_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/5223003859.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/78130509847.pdf
    • https://cdn.shopify.com/s/files/1/0459/9663/8365/files/99318905720.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/alisan_porter_blue_bayou.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/munuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/28071526381.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/momodada.pdf
    • https://cdn.shopify.com/s/files/1/0433/1280/8091/files/botokus.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_off00006ab2.bin
d7e210ae18d73aaa58697687741655b01832b68920fbbba1e62f565a1ad0cc36
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB2 5128 bytes
font_01_sfnt_off00007c50.bin
b1915365d440e4c2f0f67c0cf7971047fe9c820eef735593a006d4bce2215d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 9936 bytes