Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebeeca36d3df8e2…

MALICIOUS

PDF

32.7 KB Created: 2020-08-14 11:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3309a6775136f2483b677595d22ffc71 SHA-1: 4a124d330ebce78e9fe20008f56efb4c7139893d SHA-256: eebeeca36d3df8e25d50e6de793e56e9a6b363489b55c2f09a6d968ed99421d4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to lure users to malicious sites, potentially 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.com/wb?keyword=survival%20analysis%20rupert%20g%20miller%20pdf
    • http://temaba.bodyworkbybarb.com/uploads/1/3/1/8/131856772/ruledibifuxurupuga.pdf
    • http://files.ipinternal.com/uploads/1/3/0/8/130813095/267944c81ee.pdf
    • http://files.marketingbycat.com/uploads/1/3/1/4/131483336/zatewij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/12897568155.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/pimewuludeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/rehoboth_beach_marathon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/57034657631.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/xasimoderik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/xalekesaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/15637605548.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/iso_8601_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/nakenunirarawovabakujupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/jomapipodedarupod.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_off00004201.bin
97d306303f1c0c4b586112f71f94deaba28158f4dbe0a01c767098ffd4b540c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4201 5624 bytes
font_01_sfnt_off00005514.bin
9d3fe9f0de7e1c732d5f6fa203c6a1fe182147adcc1bb1f2281cc024418012df
pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 9660 bytes