Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdba8a1dd214566…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 04:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 387b7483a698eac98b1e725b174154be SHA-1: 6fe055dad77f4774bc84594b5ecfbcbb0cff1852 SHA-256: 5bdba8a1dd21456603e480650e07ef5d5e15d0cb595fba37e4086e5e3fb5bd79
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=vidmate+video+er+uptodown+android'. This indicates the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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.cc/pify?keyword=vidmate+video+er+uptodown+android
    • http://files.romeosinmercersburg.com/uploads/1/3/0/7/130739831/mojorogabadebe_fabeforof_wuvagesuli_vivarafijewekab.pdf
    • http://files.saintjohnparishmorden.org/uploads/1/3/0/7/130775373/606.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/98755395536.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/7724250862.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/wugaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/5016/3609/files/rusted_key_risk_of_rain_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/5055/7855/files/vubakuwitixoxoxolaziwixok.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/84681147577.pdf
    • https://cdn.shopify.com/s/files/1/0466/2856/9253/files/bogiwexezivusexulejakiwov.pdf
    • https://cdn.shopify.com/s/files/1/0462/9502/3776/files/ullu_all_series.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/64575325839.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/barycentre_logistique.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/2493214875.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/niwuxodimolofubodokolu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005286.bin
a83f93f159a9b7c3790bab55b519723b4574e58311d73fb0e392eef5d5624e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5286 4896 bytes
font_01_sfnt_off00006322.bin
b86a4b7455ba601eb0db36c54daca3b5c6f6e790451d8763b7a9a5885f561e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 9880 bytes
font_02_sfnt_off000084ff.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 4324 bytes

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