Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0bc13e1f5cdbae…

MALICIOUS

PDF

55.1 KB Created: 2020-07-30 10:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65dcdf4b4b51a26ea36fe4d838b600cf SHA-1: 3a1a251bcc2789e52ab4e46fc29af4e64727476f SHA-256: 6a0bc13e1f5cdbae514034b7a762adc128c2c9d2fc14f053984593fd1f71ad68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains keywords suggesting a lure for search engine optimization, further supported by the PDF_SEO_LINK_FARM heuristic.

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.ru/pify?keyword=hebrew+word+study+chaim+bentorah+pdf
    • http://files.llandudnosmiles.co.uk/uploads/1/3/2/7/132710624/mawemajawupeziri.pdf
    • http://files.feliceabarr.com/uploads/1/3/2/8/132814024/4587eb18f.pdf
    • http://files.masonridgebrittanys.com/uploads/1/3/1/3/131398010/gijapuro-ziwabuxinifaxij-sureg-zetazutovo.pdf
    • http://files.facethecolour.com/uploads/1/3/2/6/132695828/vagevarizavamezujez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/majowoxevigopilogibikov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/18956428213.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/zoxidonasukuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/newikonumitesiwaxabofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/80896445670.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/69931693581.pdf
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/pufefolixalezeda.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/49844021071.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/gobuzokedeloti.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/24579856173.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/86118490162.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/litepekow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/jejufejabesujuparixibiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/46731351727.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093d8.bin
e760df72853f5ce2ab5ce998063f9a7fc1ef4a0b85d88278f43e8d79b7bbe889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D8 5540 bytes
font_01_sfnt_off0000a698.bin
98a51b4f413d2c9e55d25dba6a35f9c91bec2bba55bba634f8f8bf5d3a7f776d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA698 11664 bytes

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