Malicious PDF — malware analysis report

Static analysis result for SHA-256 040597eecd37e196…

MALICIOUS

PDF

44.1 KB Created: 2020-08-01 10:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb3213174ad7d14c65c1a05e0d4b92ef SHA-1: 9bffc8864ce4877d3b6d63a71a151b3104dd57c7 SHA-256: 040597eecd37e1963751caea2f79954a7d867d06d7cb6055d2fb1592f5bd9459
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body and embedded link structures suggest a link farm designed to manipulate search engine results and lure users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, and the presence of numerous links indicates a phishing or scam attempt.

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=bowflex+exercises+pdf
    • http://files.sonasasia.com/uploads/1/3/1/4/131437711/6138187.pdf
    • http://files.biesebroek.eu/uploads/1/3/2/6/132695244/dugozifagulerubexu.pdf
    • http://files.veiledmovies.com/uploads/1/3/0/7/130775009/lezewag-zupogexavutokow.pdf
    • http://files.blackriverquarries.com/uploads/1/3/0/7/130775053/wadifobija.pdf
    • http://files.valeriaflorescano.net/uploads/1/3/0/7/130739831/jixebofudedusajisa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/85306542749.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/62234464359.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/85212528302.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/59478638002.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/lamotir.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/kinuzewi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/wuzidagonosodaruxuvuluv.pdf
    • https://cdn.shopify.com/s/files/1/0428/5785/7187/files/xugugove.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/45725027578.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/somuvogeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/35106695354.pdf
    • https://cdn.shopify.com/s/files/1/0429/8555/4073/files/zojikinurelagajofawu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7936/6811/files/turinu.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_off00006e74.bin
3c7471ebab25513dcc33a3b399bab86a0df0da2d8437091d195f5adcbbeeb75f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 5148 bytes
font_01_sfnt_off00008028.bin
fa587315d17ef1428485c8505a4209748ff309718f7d71abaf45d91040029be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 10400 bytes

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