Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6227bf5f70b6da…

MALICIOUS

PDF

55.6 KB Created: 2020-08-11 23:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b96c05019de8236802bb8ccb8490482b SHA-1: c3c5c69012d368ab1c213885f8de0b89a890956c SHA-256: 5a6227bf5f70b6daa73cf59cc305cba4024209bcacf2cb5137410b23fbfc4cb0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=brahm+kavach+paath+pdf', is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking these links, potentially leading them to malicious sites or further malware downloads.

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=brahm+kavach+paath+pdf
    • http://daluvi.tbenthusiast.shop/uploads/1/3/1/4/131438477/3874183.pdf
    • http://vawon.brokenoakacres.com/uploads/1/3/0/9/130969204/abcce99d43.pdf
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.pdf
    • http://files.snokingmetals.com/uploads/1/3/1/3/131378918/76fee6769d7ae6d.pdf
    • http://files.upscaleconsignmentsale.org/uploads/1/3/1/3/131379846/bewewokuzadabav_kedopiniponet_sonupowonutetep.pdf
    • http://geags.com/1at2fv
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/78633689872.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/90513383455.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/surah_yasin_download_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0435/3546/6655/files/pizeduvosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0039/files/thyroid_and_antithyroid_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/ford_explorer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/tiwokevasitukanawo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/felizu.pdf
    • https://cdn.shopify.com/s/files/1/0448/1413/9558/files/wexisalaximonotave.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/71373752683.pdf
    • https://cdn.shopify.com/s/files/1/0438/8270/9160/files/68769144197.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/foxy_roxxie_ssbbw.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bfc.bin
eed330f3fce3afd7f21b71f1291e6b03728c7440d42be861583f76603168e5ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 5360 bytes
font_01_sfnt_off00007e11.bin
6ce3ed3d0cf168fbf74d6eb321148d5efc31cda11559831b77020f7d4c9f4c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E11 3740 bytes
font_02_sfnt_off0000898b.bin
05bd90f83b621aea7d7c8724ab38e96a821c2cb07e33611f08527b233c49fc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898B 7232 bytes
font_03_sfnt_off0000a26b.bin
3f3e14bf6df9062bf0dc1c1055e26519e10e9fe99789a9daaeea9d7639bd4925		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA26B 15048 bytes

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