Malicious PDF — malware analysis report

Static analysis result for SHA-256 679d4636666bf5b1…

MALICIOUS

PDF

48.7 KB Created: 2020-08-10 11:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aea1dbdda9482ed12f3eb16ee2963f1 SHA-1: 86718726a87f529284722a54dc26e5525423ff2b SHA-256: 679d4636666bf5b168e9fb1bef3ac0b2b3f302fdc7e5a4cba7632112fbdc1f31
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'SE_MFA_LURE' indicates the document is designed to trick users into providing sensitive information, likely by impersonating a form or login page. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=e+aadhaar+pdf+form+download
    • http://files.anroflowers.co.za/uploads/1/3/0/8/130874086/183664c2dd695a.pdf
    • http://files.miramesaorchestras.org/uploads/1/3/2/6/132682471/nabosasukobek-sutiselari.pdf
    • http://xotupa.professionaltruckingschool.com/uploads/1/3/1/6/131606407/litirutove-zojaso-teremibeta-tatezusejuzo.pdf
    • http://popumofaz.sdedesigns.com/uploads/1/3/1/0/131070420/9b61730f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/gozilulokivuzatuzumumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/punctuation_passage_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/ninozogenepasufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/abecedario_coreano_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/rodekekeromutubebogalit.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/puraduwotipoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/ay_papi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/66987250791.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/miremilul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/1429360064.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/varufirefesuwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/94229043243.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_off0000757e.bin
56a6443151c9360360fef4644546d1e4b90a287da3646d5be3dacb913bbf23ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757E 4696 bytes
font_01_sfnt_off00008547.bin
11dbfb11e1e087e3b9a5e890b8b980436ff30b86a1a78deda2e323eb507094b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8547 10180 bytes
font_02_sfnt_off0000a802.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA802 4324 bytes

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