Malicious PDF — malware analysis report

Static analysis result for SHA-256 34921fabde0a20e9…

MALICIOUS

PDF

43.6 KB Created: 2020-07-30 19:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e625ff52c2ee29d5abb1f50e5eb0e8 SHA-1: 6f5cb089d929795ccacb9204b05d6ffeb9e2a9d1 SHA-256: 34921fabde0a20e9c9fbda8e4c836cbae939f80d6177933ebae5d5a8e5456de5
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a magazine download, suggesting a lure. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious infrastructure, likely for further exploitation or malware delivery.

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=bluprint+magazine+pdf+free+download
    • http://files.enfusiasticart.com/uploads/1/3/1/4/131437158/ce98cb7b.pdf
    • http://files.sandiegocountyrecordersociety.org/uploads/1/3/1/3/131398194/9540226.pdf
    • http://files.grettaharleymusic.com/uploads/1/3/1/4/131437380/vogowujelizo.pdf
    • http://files.canyonrunner.com/uploads/1/3/1/1/131163687/aed9914e924bdd.pdf
    • http://files.grettaharleymusic.com/uploads/1/3/1/4/131437380/vogow
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/56313469867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/28010390103.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/60194266101.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/26612861691.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/jawuxerubotoderufolubudir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/86472256619.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/27261903459.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/rovepuzilopateliruge.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/femawima.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/11364938158.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/40609646756.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/zajopipotimijajove.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/dibogowesewaremovo.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_off00006c40.bin
da0051975599260081515515c7891378e755f5904592b74bb88d9e8d6c04e56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C40 5256 bytes
font_01_sfnt_off00007e1f.bin
83218df0f10c83aed34534db4bb747f60c03f344b397daa324543233f95e50da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 10172 bytes

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