Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2f768e1fb9f54d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-15 14:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4cb2e058cefffbb84b95d36c77182f5 SHA-1: a6eb03f98ff8d13fee52acb6042e093e630a67bd SHA-256: 9e2f768e1fb9f54d8b34327eb607a3030baed9b5ce33267c2c0cb3ac10687a3a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link redirecting to a known malicious domain. The document body, though partially corrupted, contains text related to 'Python idle free for windows 10', suggesting a lure for users seeking free software. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent. The primary malicious URL identified is https://ttraff.ru/pify?keyword=python+idle+free++for+windows+10.

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=python+idle+free++for+windows+10
    • http://maxel.chicagoforchicagoans.org/uploads/1/3/1/4/131407089/xitugedalale_gurokajumaluner.pdf
    • http://files.samvlcaks.com/uploads/1/3/2/6/132695280/2932943.pdf
    • http://files.johncobbphotography.com/uploads/1/3/1/6/131637038/3197393.pdf
    • http://xuvodobu.mindandhomeinsurance.com/uploads/1/3/0/8/130874359/73b91ef.pdf
    • http://sizukewo.artwithmssiepka.com/uploads/1/3/2/6/132682883/378496.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/54957278580.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/18279169790.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/dunokotenaxafano.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/zokinosawawopugisiniga.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/3864493141.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/vatuderapanekubikal.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/50028023899.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/80863359824.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0433/6163/2406/files/99947251893.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/wow_classic_fused_wiring.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/9831008426.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/mamejoxidined.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007695.bin
765ce7ce5012479e9b45b1095c363fac63b488301f611b93c177762d473c5ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7695 5176 bytes
font_01_sfnt_off0000883d.bin
b4aaa6f00a160c9f0ac56348cd59155167f17f89fd063125bdd91fcb80d778bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883D 10084 bytes

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