Malicious PDF — malware analysis report

Static analysis result for SHA-256 753d3f5f22f7bb1d…

MALICIOUS

PDF

60.8 KB Created: 2020-08-04 15:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a972ea4eed94001274c0b4075d3dee25 SHA-1: 0b07ad4a063fe0119cdde79965f5d5afa79a96d8 SHA-256: 753d3f5f22f7bb1d764ff26f2d168e489652a47e3f545154fbab4a3dd74665ac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The primary malicious IOC is the ttraff.com URL, which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same malicious 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.com/pify?keyword=activated+sludge+system+pdf
    • http://files.nweprowrestling.com/uploads/1/3/0/7/130739544/5ef45f8.pdf
    • http://files.penangjewishcemetery.com/uploads/1/3/1/6/131607943/podus.pdf
    • http://files.newleafpottery.org/uploads/1/3/0/7/130739174/nenoxim_wekizox_raxosivejiwa.pdf
    • http://files.delaneysalonscoppell.com/uploads/1/3/1/4/131482819/dogugisenuk-kinusop.pdf
    • http://files.delaneysalonscoppell.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/clear_cache_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/togidupezututukavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5271/files/biggest_cities_in_usa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/75009832101.pdf
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/bernard_werber_les_fourmis_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/34850305171.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/85574626542.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/nubixisid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2386/7805/files/kawobefewavotipepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/8066520348.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_off0000b0b9.bin
31f8badbeae271b3a412d726e1d212b321659eb8b89d8233582f22cdaabfa84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B9 5528 bytes
font_01_sfnt_off0000c390.bin
68b1e8cd9309f8ed1d99e97419e40659441e1dd5b0ccb8bfa0b629a1f12e3fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC390 10088 bytes

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