Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e212040220fa820…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 13:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304ab2efd8017387096cc18368773286 SHA-1: 0444e976748cb312e2e6eae5d520eef3d5a696c1 SHA-256: 9e212040220fa820eb5645618448b4763b66ca44b9634f113caf58873cdf69b6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service identified as malicious. The document body, though partially corrupted, contains text related to 'Ias cadre allocation 2020 pdf' and the tool 'wkhtmltopdf', suggesting a lure for information related to civil service exams. The primary malicious IOC is the redirector URL https://ttraff.com/pify?keyword=ias+cadre+allocation+2020+pdf, which is likely used to funnel victims to further malicious content.

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.com/pify?keyword=ias+cadre+allocation+2020+pdf
    • http://files.gpimedical.com/uploads/1/3/0/7/130776602/b1f894765525c.pdf
    • http://files.joyloveandlight.com/uploads/1/3/1/4/131482941/kineluwaji.pdf
    • http://files.melanieveazey.com/uploads/1/3/0/7/130776611/927560.pdf
    • http://files.mikebernalmedia.com/uploads/1/3/1/4/131453894/2218119.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/46334270430.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/7th_grade_civil_servant.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/64457472993.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/23540218486.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/volin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/boxopikebim.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/xilafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/pivarume.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/25376115469.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/jedel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/fapis.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6515/files/office_for_mac_crack.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_off00006741.bin
33df931d43729aaba796d9e21115c4cd643605a08b27aa45102820c60c80b6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6741 5360 bytes
font_01_sfnt_off00007986.bin
18b595697cdcfaed0c3e1b12853427351c352d65bd809828db796a522700caea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 10352 bytes

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