Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6475fcc59e3810b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-20 13:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddce926cf201fb5472c131ddfb5ce15a SHA-1: 55fc6fd7db219ff1b49cbbe0ca344950bbebcd54 SHA-256: e6475fcc59e3810b23fe8ed6baaef667614ae6c9d8b94cf99fa097ab2f3902a0
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=dangal+parents+guide`. Another critical heuristic identifies this as a PDF link farm, with many links pointing to `cdn.shopify.com` domains, likely as a method to distribute malicious content or obscure the true origin. 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=dangal+parents+guide
    • http://files.nashvilledebateleague.org/uploads/1/3/0/7/130740517/8651c.pdf
    • http://files.mrptristan.com/uploads/1/3/2/6/132695828/xowikitezamoxa.pdf
    • http://pijete.sdesworks.com/uploads/1/3/1/6/131637316/dujefiluj.pdf
    • http://kivasuviz.baldguyfishing.com/uploads/1/3/1/1/131163599/8735390.pdf
    • http://najaramuk.jamiechristiandesplaces.net/uploads/1/3/0/8/130874359/bewumawakexojagego.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/21965140444.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/asche_abar_shabor_movie_480p.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/rowepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/nanimekunur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/sitapurogoroni.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/11214425614.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/fumotinaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/geridowujezuwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8823/0053/files/amtrak_schedules.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/85170438925.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_off00008254.bin
02cea5c50e75187b4d92b3a6c9520dfc300c5731fe0fda6ad8bd16010d298ad1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8254 5124 bytes
font_01_sfnt_off000093d2.bin
cfa806f250bec0034034236580be20d040850f59d29fd6644ec2de7b2f918901
pdf-font-stream PDF embedded font (sfnt) at offset 0x93D2 10340 bytes