Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc110a20650f234…

MALICIOUS

PDF

47.0 KB Created: 2020-07-29 16:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a13ac5817ee00c40b6b5f7eb7e24c06a SHA-1: 425373b04ac90d1765a939305640fdd05829e15f SHA-256: dcc110a20650f234392729a255988fc124cddc0165f2c898614e1198460ec714
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains metadata suggesting it is presented as a handbook, likely to deceive users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=esmo+handbook+on+clinical+pharmacology+of+anti+cancer+agents+pdf
    • http://files.blingattiphanys.com/uploads/1/3/1/1/131163846/8613768.pdf
    • http://files.crawfordcountysolidwaste.org/uploads/1/3/1/3/131383251/a7a8a64223a11.pdf
    • http://files.avonformwork.co.uk/uploads/1/3/1/8/131872137/kumajinosu_zuvalokinuva.pdf
    • http://files.prickwillowmuseum.com/uploads/1/3/2/7/132740480/texojibibazubevozim.pdf
    • http://files.bettyvaughan.com/uploads/1/3/2/8/132814261/723dd8d392881.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/96736512016.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/90401104859.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/xipajazekonazeguladogiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/doloviwagotul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/biwosuzazibuvawumup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/baregijawufokagigeji.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/bavejenebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/gogixilifuxijewub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/wugugosexuxenulekiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/bodokinameba.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/nonovo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/kubiwuzavebuzugid.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/91603536789.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_off00007953.bin
dd7f6c072f2d08ba08df285a69dcc60210dd48a03e61fa6272fb85a339dda00d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 5620 bytes
font_01_sfnt_off00008c46.bin
bc229b456b03ce6a6f1bb41c06cc47cb24900f6d62d7118f3a9dbec69e0b7e0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 9936 bytes

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