Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1126624224f8fc7…

MALICIOUS

PDF

36.3 KB Created: 2020-09-13 18:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e1433e45e15302961c08323e1a82f2 SHA-1: 4d36609a791f5bc57eb089c22a1664b6ff1360c7 SHA-256: d1126624224f8fc73acb5d1e0f55f22fb1ae5b21e4b433a1582810f7614682a6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as 'https://ttraff.link/pify?keyword=talman+elementary+school+chicago', are likely part of a phishing or malware distribution scheme. The document body contains garbled text but includes the same suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/pify?keyword=talman+elementary+school+chicago
    • http://jijogi.welshpromscymru.com/uploads/1/3/1/3/131398455/fopode-rokipisupimodu-vapinonarel-nujado.pdf
    • http://files.missspic.com/uploads/1/3/1/3/131384374/a1047c.pdf
    • http://fexene.redpetalsmedspa.com/uploads/1/3/1/8/131871721/dezowetivutosiw_jiduvasurejof_losazilemazep.pdf
    • http://files.danielphotographyltd.com/uploads/1/3/1/3/131383791/5010018.pdf
    • http://files.vincentsgermanshepherds.com/uploads/1/3/2/6/132680867/mubevubip-tizupelazasuza-momidim-bekijar.pdf
    • http://files.mrcoopersclass.com/uploads/1/3/0/7/130775435/4589199.pdf
    • http://binalom.vinoetamicis.com/uploads/1/3/1/4/131406821/1425fc6c8d4.pdf
    • http://files.markweisner.com/uploads/1/3/2/7/132741064/313903033.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/wofebovotifozobamulekaw.pdf
    • https://cdn.shopify.com/s/files/1/0461/8479/2227/files/fulazelojuzajofamu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/fanuc_cnc_troubleshooting_guide.pdf
    • https://static.usrfiles.com/ugd/62e2c1_b639a837732746a08e2e49bc29d65301.pdf
    • https://static.usrfiles.com/ugd/0779a3_0bc34b9906fa4a33a16876cfcb1eee3a.pdf
    • https://static.usrfiles.com/ugd/29c71c_338ced42578b46028107a23e2764057e.pdf
    • https://static.usrfiles.com/ugd/733c1f_0e81fc58af724f31aef8c8a46cd20968.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_off000050db.bin
3b6d913bb268c3fbf61429f966b850460a439b6bebd6374bf7acdc0c1a87cf13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DB 5264 bytes
font_01_sfnt_off0000629c.bin
681563fe7b27fca60f55271f069be6193fb60065a33800429912dc591726ed6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 9904 bytes

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