Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6b3c64b5bdfa26…

MALICIOUS

PDF

42.4 KB Created: 2020-07-27 20:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 397327a7c00bc8514608b4d40c1811d0 SHA-1: a5042545ab052bc86090597c8ed7ffd292fdfa5e SHA-256: 2b6b3c64b5bdfa2683230e115da0f7de704d112881ebdca387f322b24477e6c2
152 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, primarily through its inclusion of a link farm pointing to a redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to lure users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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=hengstler+ri58-+d+datasheet
    • http://files.oileranimation.com/uploads/1/3/1/4/131407709/852292.pdf
    • http://files.junejordan.net/uploads/1/3/0/8/130874510/ripodum.pdf
    • http://files.vibewithshannon.com/uploads/1/3/1/8/131856769/9551066.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/14176488971.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/62869252566.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/bumolotajapazezadozal.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/72385627085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16494210232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/62824111311.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/pixatufuvuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/3865792863.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/25189274890.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a5.bin
96d59873379323f4b3c53d085875b0580314149545f3569236367a541e0ef815
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 5076 bytes
font_01_sfnt_off000071d8.bin
dea6fba94da27847a815a75222c0625592a55b73e483140d0269c7cee3e0132e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 13752 bytes