Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4212e4d7fb2c0f…

MALICIOUS

PDF

44.6 KB Created: 2020-08-22 05:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c24b69bf9355f7a2b9d028d3c51552d SHA-1: 2046709118a201620fea6a85917c5815494ff8cb SHA-256: 0a4212e4d7fb2c0f675a9e8fbf29df8ff7397daf0e1cead0c4aa66c9674b0de9
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign PDFs. However, one prominent link redirects to 'ttraff.ru', which is flagged as malicious redirector infrastructure. This suggests a tactic to drive traffic to malicious sites under the guise of providing legitimate documents, likely 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.ru/pify?keyword=rack+and+pinion+steering+system+calculations+pdf
    • http://files.shipasapfreight.com/uploads/1/3/1/1/131164063/sufozavew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/14816910663.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/diabetic_ketoacidosis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/lifojaremaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/53333451024.pdf
    • https://cdn.shopify.com/s/files/1/0434/3732/6488/files/kakezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7206/9525/files/83746088686.pdf
    • https://cdn.shopify.com/s/files/1/0438/2140/0226/files/38384834993.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/59748319354.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/child_and_adolescent_mental_health.pdf
    • https://cdn.shopify.com/s/files/1/0450/9813/9813/files/cahier_de_vacances_espagnol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006189.bin
2fa0bffe31e25819cccbde4e80d0a9855add02a3fe198877b2b6203be8ad9315
pdf-font-stream PDF embedded font (sfnt) at offset 0x6189 5528 bytes
font_01_sfnt_off00007443.bin
c18f5d2885f405b0750da85f55285ca25f97ae8182ba171302e3d444b705cc85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 10272 bytes
font_02_sfnt_off00009764.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9764 4324 bytes