Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db80e969e038fed…

MALICIOUS

PDF

72.3 KB Created: 2020-08-19 03:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c114f93b99499b69bb6a89a78303b3 SHA-1: 23eca759a1ddefc0a7e762248ccb825684230758 SHA-256: 7db80e969e038fed23a0b3a9365959a867344e0f668f83bdeb00785cc45a9084
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains the same URL found in the heuristics, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness. The presence of multiple PDF links, as noted by PDF_SEO_LINK_FARM, further supports a malicious intent to distribute harmful 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.com/pify?keyword=definition+of+informal+norms+in+sociology
    • http://files.artistginasouthgate.com/uploads/1/3/1/4/131453695/vaseji-zidajunojupuf.pdf
    • http://files.peacefulthoughtstherapy.com/uploads/1/3/1/3/131398099/ginevelul-xedanezamedep-wumusimuvixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/81641164160.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/fozasoxuzotopesutef.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/17175494652.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/army_punjabi_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2597/files/81983814542.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/54957278580.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/59512703696.pdf
    • https://cdn.shopify.com/s/files/1/0434/1818/9980/files/xuwitotiberi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/island_beach_state_park_fishing_report.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_off0000dec5.bin
0e9e81749b85f9aa7139eb5f3018cd9349c79d2a5bd7f11d079daf8d7a17a8f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 5300 bytes
font_01_sfnt_off0000f0bd.bin
4a760be026060265d5a93e7a244b537ac62b3b9d3591e9f2c18db920ef7aa89f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BD 10436 bytes