Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdb2f6749e9b994…

MALICIOUS

PDF

42.7 KB Created: 2020-08-22 18:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29a0650abb976298d1719735596896e8 SHA-1: 8b0711c4956d0794b6f26b49d8ec5b45ee758eb8 SHA-256: 6fdb2f6749e9b994512c1ee9b75cd328c23f09f8611819731ffed70aaec1867c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits a PDF link farm, suggesting an attempt to distribute or obscure malicious links. The embedded document body contains a URL that points to a redirector, further supporting the malicious intent of leading users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=alpsankhyak+form+date
    • http://getoderod.canoefun.ca/uploads/1/3/0/9/130969057/7974160.pdf
    • http://files.goodsonsilver.com/uploads/1/3/2/3/132303410/nowedugivawigogi.pdf
    • http://files.shauntaylorart.com/uploads/1/3/1/8/131871849/zadinurog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/6513/9354/files/kaviwuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/rorazisiwirukenubifewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/cerebro_de_pan_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/neopets_food_club_bets.pdf
    • https://cdn.shopify.com/s/files/1/0433/3128/9256/files/kimakego.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/walter_lewin_physics_lectures.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/98314640407.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/78942882744.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_off000069de.bin
329db19a5202240cad4689d6dce1be2a6048db38d53c5b9f61c6e7eef5b67377
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 5436 bytes
font_01_sfnt_off00007c2e.bin
702f6fabeb18e63b7c83f3bb49a584190a2a2bd1ba8e718f094a079b87af0b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 10012 bytes