Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2464441ef7cf2b5…

MALICIOUS

PDF

44.4 KB Created: 2020-08-17 16:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37f9ec6ea7d06205d24d545391c9534f SHA-1: 43928c905a07284c4e3cc73d773e301e1ec8839b SHA-256: f2464441ef7cf2b55b5ba6202058080be8f8eeb15237f9e910b0e2bf637b92a0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=trust+deed+format+in+marathi'. Another critical heuristic indicates a PDF link farm, suggesting a broad attempt to distribute content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs, reinforcing the lure.

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=trust+deed+format+in+marathi
    • http://files.club.glyncor.com/uploads/1/3/0/7/130739856/matidevugun.pdf
    • http://files.dosisquares.org/uploads/1/3/1/4/131411088/zuliwiwufenule-vabiw-suzukajurexo.pdf
    • http://dokubutap.rktttherapy.com/uploads/1/3/1/1/131164250/5769596.pdf
    • http://files.catherinebliss.com/uploads/1/3/0/9/130969160/rekaloniw_tizapevurok.pdf
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/add_text_to_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/wagivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0413/files/naruto_shippuden_episode_388_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/mazud.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/brahmacharya_rules.pdf
    • https://cdn.shopify.com/s/files/1/0432/3721/2319/files/ct_brain_anatomy_atlas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/zunozanetimokoziwi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/81992699857.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/crecimiento_y_bienestar_emocional.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646f.bin
dd99a36359b8e9b8899af00e92b605929e7000ec08cdd3d0a33fbb0ee2dbe239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 4948 bytes
font_01_sfnt_off00007506.bin
f0d29343924c82922246f4c5b989a00d88c5d976b0440c0c361afc9bbb9fac6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7506 10032 bytes
font_02_sfnt_off0000975d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975D 4324 bytes

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