Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc17533690cad2a…

MALICIOUS

PDF

48.6 KB Created: 2020-07-29 20:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c609f82d9f4cd02533ca0b585f7872fb SHA-1: ed1b18b48f702918da2d8c1b450d81efaeea3902 SHA-256: 3bc17533690cad2a51ef5aa19915f76558a0574825294aa23d3c62689110dbfe
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to domains that appear to be part of a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=car+sale+agreement+format+pdf
    • http://files.ellendonaldson.com/uploads/1/3/1/4/131407767/d56cc.pdf
    • http://files.bg-osteopaths.co.uk/uploads/1/3/0/7/130740536/nimakexogufemo.pdf
    • http://files.thecontemplativeacademy.com/uploads/1/3/0/7/130775727/selasexajiki_vokuf_surelagipa_mugixitafojosa.pdf
    • http://files.momentum-emporium.com/uploads/1/3/0/7/130776812/84f59e871db7.pdf
    • http://files.swisskissgreaterswiss.com/uploads/1/3/2/7/132740586/tularoganimuwiza.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/978119025.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/24845448892.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/16304906454.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/nuwulipekeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/pamef.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/97826778125.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/42041591734.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/jerekana.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/xeperebopuxekoparito.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/11826282023.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000813a.bin
86e213bfa11733045e1d5174a32fd547fc3d987a6d7dabeba3b86ed79121b82b
pdf-font-stream PDF embedded font (sfnt) at offset 0x813A 5124 bytes
font_01_sfnt_off00009296.bin
4475618580b79ae028b86d3090b824c121f14d41eae68b8c2277f14f6a56c3c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9296 10136 bytes