Malicious PDF — malware analysis report

Static analysis result for SHA-256 034e57b944f4043f…

MALICIOUS

PDF

46.2 KB Created: 2020-08-09 03:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792d6b4b58c77eff28de2092d6eedec4 SHA-1: 225c4b7648bb59fdaeac2e02da7d0aa09bb7c015 SHA-256: 034e57b944f4043fc146d3f5b8fd88dec199ec545394de3ef01f9d7c91511bf8
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=loksatta+epaper+nashik+pdf+download', is flagged as a malicious redirector. The document body also contains this URL and other Shopify links, suggesting a link farm or SEO manipulation tactic to lure users. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=loksatta+epaper+nashik+pdf+download
    • http://files.cupcakekisses.org/uploads/1/3/1/3/131398109/3106751.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://vikamuban.stuffrobpaints.com/uploads/1/3/2/8/132814930/5131388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/gitofozirejulobosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/sovuzemozemowazivevaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/58878581495.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/83483486575.pdf
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/security_supervisor_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/6507713154.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/xopisipapan.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/zimapogulododajexexox.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/benim_hocam_corafya_soru_bankas_2020.pdf
    • https://cdn.shopify.com/s/files/1/0451/0826/5125/files/fefatesunud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2406/files/mckee_biochemistry_5th_edition.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_off000070ce.bin
33ceceaf6d9bb2783cb1462962622e5f8788fbd4f7a58288ec0b7405f4e98364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 5228 bytes
font_01_sfnt_off000082ac.bin
22f5a7921e79489209e3acc204602c1feda3c5050f2244c7eb3e2ff241c96e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 12956 bytes

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