Malicious PDF — malware analysis report

Static analysis result for SHA-256 a772f1bd98badc73…

MALICIOUS

PDF

50.4 KB Created: 2020-08-02 16:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ca1f05997230c1b82a160bd504c77f7 SHA-1: ed8435087f53b5e566db9b78245d8b6f2b74fd9f SHA-256: a772f1bd98badc732dbe0e11f458769473776699d68a6560b998741eb405e304
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Dnd 3. 5e player's handbook pdf' and the malicious URL, indicating a lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious URL.

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=dnd+3.+5e+player%2527+s+handbook+pdf
    • http://files.nypa.com.au/uploads/1/3/1/6/131636655/6a2b92a2.pdf
    • http://files.leenajuvonen.com/uploads/1/3/0/8/130874676/6795280.pdf
    • http://files.lutoncentralmosque.org/uploads/1/3/2/3/132303001/lovezuwoxurujiba.pdf
    • http://files.fightingsawks.com/uploads/1/3/1/4/131407668/runajilisaxasinuba.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/venetinato.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/54613839681.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/kawibipif.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/8493796748.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/9349741940.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/22648627162.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/wevovaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/9119723122.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/15990174740.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/32721094607.pdf
    • https://cdn.shopify.com/s/files/1/0429/5062/3385/files/66335067037.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/dudedeli.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_off00008629.bin
c8ab514fcd930a966c21eb12791586f240f0355d8aa28a75d4d2a322519cf2e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 5788 bytes
font_01_sfnt_off000099f1.bin
51f211417dbc7b58ea2a6b41b57f3ea0fb92d0492c5c6c93123f5f0bac9ea817
pdf-font-stream PDF embedded font (sfnt) at offset 0x99F1 10112 bytes