Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d165db4f2d51c6…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 18:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 716c0e2b1269756921c3f9c90b424d94 SHA-1: ba1a240ad18aab2aa8777e479e2aebf1ae232c48 SHA-256: 08d165db4f2d51c6d73478f5ce4bd0dd955a286acfcfd1a07391e5faef1054f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and a URL that likely serves as the initial lure. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

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=gravely+walk+behind
    • http://files.arsalynyouthforums.org/uploads/1/3/0/8/130813837/rarenasonena_pazegoninid_polob_jufewa.pdf
    • http://files.southafricanpoliceofficersmemorial.com/uploads/1/3/0/7/130740443/xewegaxalij-loxovejezilisu.pdf
    • http://files.lifeimpaired.com/uploads/1/3/1/3/131381721/6051430.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/xumotubuwewokuluri.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/97228006828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72645751706.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/lowezegaku.pdf
    • https://cdn.shopify.com/s/files/1/0438/4076/6109/files/fapezobobaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/zubidorepode.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/miralobojuwizasigubofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/65009709621.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/50605010046.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/86273262360.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/kigonulopowosuwovoduwape.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_off000063a0.bin
d0ff32987ba73fd7368ccd3419beeda8333d702670e23b009d040b91b7ad1543
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 5224 bytes
font_01_sfnt_off00007576.bin
7cebba0104e99f19f470b4ff9a204b74bd6de1a7a8a61da05a23897036fb2a1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7576 10308 bytes