Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c9391c9383433e…

MALICIOUS

PDF

44.0 KB Created: 2020-08-01 13:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e11fe4415372b6b3b750c6dea683f752 SHA-1: 28749452e5a16de299e1ef680fbb1c08644b5865 SHA-256: 14c9391c9383433e9fe0c8db375f7fd293df91172e2744ac510ae24eac7f4f68
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, potentially 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=duff+book+pdf
    • http://files.traddict.biz/uploads/1/3/0/9/130969993/vogedixiteras_bilidatifobaji.pdf
    • http://files.pronino.org/uploads/1/3/0/7/130740490/2909465.pdf
    • http://files.woodenbowtieentertainment.com/uploads/1/3/0/8/130813777/xajaleki-xodude-mojezuwufuw.pdf
    • http://files.brooksidepathfinder.com/uploads/1/3/0/9/130969146/sazuxa.pdf
    • http://files.jeebdesignfishers.com/uploads/1/3/1/0/131071164/9181067.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/43482719833.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/zobufevegisiwuxaxenij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/kekebitek.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/dipokeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/87202701417.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/zekorupibev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9491/7799/files/sidiwoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/81535329100.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/xujowifaful.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/jezaluzudevitasaxuwulufi.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_off00006f46.bin
f6eeb7912533dd6abbd37ff6059e5245386d05ad80ac37a9863562c49fc96d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 4720 bytes
font_01_sfnt_off00007f6f.bin
730b1539409bff1d19fb709c8ea198cc89aebd7ade8738beb83e921b8731afce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 10776 bytes