Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dc7c8f6f0d0e29…

MALICIOUS

PDF

44.6 KB Created: 2020-08-23 01:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13a6ab84be7ba1ebd8b79ec87ed7eddd SHA-1: 5efd6c9e808851a098c137aa28dde6c2521b4ecd SHA-256: f8dc7c8f6f0d0e293391771a78dccf19332a0d90b7bddb390e8cac67eda487e8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised within a fishing report theme. This redirector is likely used to funnel victims to malicious sites. The PDF also contains a large number of links to Shopify-hosted PDFs, potentially as part of a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of a malicious redirector and the document's theme strongly suggest a phishing or malware delivery attempt.

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=magdalena+bay+fishing+report
    • http://files.mindmattersjo.com/uploads/1/3/1/0/131071082/sunobapaporebe-mezefaremu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/adobe_lightroom_5._7_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/photo_slideshow_html_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/66771323004.pdf
    • https://cdn.shopify.com/s/files/1/0438/3227/9190/files/bwv_578_organ.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/canadian_club_dry_can_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/38018108165.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/movikulewerudazuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/tunewamozopoliwinawa.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632c.bin
e882857886818a7c8d73806387c0797a1ee94b4648bf8e3aeb79b00e7c01ab5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5336 bytes
font_01_sfnt_off00007549.bin
5e64728b7ba9b75546a110f91bb3203d60be7896915e5e3fbec9589442c84dd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 10096 bytes
font_02_sfnt_off000097ec.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x97EC 4324 bytes