Malicious PDF — malware analysis report

Static analysis result for SHA-256 573410ddc52f92b4…

MALICIOUS

PDF

37.3 KB Created: 2020-08-14 15:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f83d9b4922692fc007af4f9457c36d70 SHA-1: 2a2dc589996e0928365c7ffb037feeba4c2bd547 SHA-256: 573410ddc52f92b4ece50da96bff30052e963c83aacd82a0b71f0bc5aa809bd0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for 'Reporter jobs in mumbai' and embeds a link to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=reporter+jobs+in+mumbai
    • http://jiweke.coda-pdx.org/uploads/1/3/0/7/130738568/20b95d53bb2fd.pdf
    • http://files.littlegemskaren.co.uk/uploads/1/3/2/7/132740965/pesorokasep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/fagedaxiguxes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/rajuxirifurazoxesuwute.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/nivotevulexozovonenanejor.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/36335557097.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5961/files/35859077245.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/381861821.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/gisejifevok.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_off00003fa3.bin
e4a6122b167e3d603641dde5004736181c6583d8072395595eff78b18fd1e633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FA3 5156 bytes
font_01_sfnt_off00005113.bin
6dc666867531bcbbc9dc454c4f533269dcaf856d1e6a9d7bd07a4d7d30d356f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5113 9532 bytes
font_02_sfnt_off000071f1.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 16164 bytes

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