Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc0967167b6a0e9…

MALICIOUS

PDF

40.2 KB Created: 2020-08-01 00:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f4b3e6ea2f581eb6cd6782165689f0a SHA-1: 8a3291973707d76def2a711b8e7a638e91e8759d SHA-256: 5cc0967167b6a0e995e65109d26be552becc14bd8edc7c5d55aaba7bb812a9ec
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 a URL that is also flagged as a malicious redirector. This suggests a link farm or phishing attempt designed to lead users to malicious sites.

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.ru/pify?keyword=gravely+ztx+42
    • http://files.themerlinplayers.org/uploads/1/3/1/6/131607237/vodabeduwetivop.pdf
    • http://files.themixedupfiles.com/uploads/1/3/1/4/131438423/ccc15df3a08d89a.pdf
    • http://files.ptti.org/uploads/1/3/0/9/130969904/4cabef1d.pdf
    • http://files.afulmer.com/uploads/1/3/2/6/132681993/sadafakijilizi_tamenuvi_wojam_xidodup.pdf
    • http://files.visionquilt.org/uploads/1/3/1/4/131482819/7dca44f6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/acs_organic_chemistry_study_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/goverabidejobod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/ansi_c84_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/sebudalosawarade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/59763596338.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/20416756078.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/70551446591.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/3009711438.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/88890662392.pdf
    • https://cdn.shopify.com/s/files/1/0438/0459/0242/files/jigifotebilijuxavuruzedat.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_off00005d46.bin
42d9bd04ad437401987264939ed78b6b998dc77035af61ebfc20976dffdc22e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D46 5032 bytes
font_01_sfnt_off00006e93.bin
19b3dc6b1a77759499f8d61233deda4cc652fb9293a7ea8a04f20be6db620f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 11076 bytes