Malicious PDF — malware analysis report

Static analysis result for SHA-256 08326d7006ec6fe0…

MALICIOUS

PDF

39.0 KB Created: 2020-08-26 05:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67fb62870d1e82f23fd58596423ab39 SHA-1: be13a8db93dabbe46d72b43fb107d45d2abec7d3 SHA-256: 08326d7006ec6fe032fb2e3ca832c229a3be375306cff8074646ab41c9dbbceb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, embedding numerous external links, with a critical finding indicating a link to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector suggests an attempt to lure users to harmful content, likely as part of a phishing or malware distribution scheme.

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=jazz+licks+for+bass+guitar
    • http://ronuloj.adaelementarypto.com/uploads/1/3/1/6/131607240/6636060.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6390/1336/files/90449317326.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/gezolelewap.pdf
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/wallpaper_good_night.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/20857222776.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/ligutogekatexowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/go_to_sleep_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/98483320823.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/6137515266.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/mathematics_class_12_ncert_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/jewudafilunibevifalepit.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_off000059de.bin
b75086b893673b5898cff078eef000c71461272233adef151ca0dce5e5bfa56d
pdf-font-stream PDF embedded font (sfnt) at offset 0x59DE 5292 bytes
font_01_sfnt_off00006bf3.bin
fee69cb4e560e2da07c4fd7f25647e450f05d8c5aaf5f339ddcbd34758ace4a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 10408 bytes