Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17479212a45c696…

MALICIOUS

PDF

38.1 KB Created: 2020-08-11 16:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1479205677c16df2ab640837092fe5 SHA-1: a682e53f75d3c590fdc736c205c6629724defbc6 SHA-256: b17479212a45c696c25fc5b3082ae1e51b6cae6f4b80cccf4847b90b11abeb09
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to employment verification. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a probable phishing or malware distribution attempt.

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=exemple+attestation+de+travaille.+pdf
    • http://files.marthastarfish.com/uploads/1/3/0/7/130775734/8933376.pdf
    • http://files.deewhyhealth.com/uploads/1/3/2/7/132741302/4240.pdf
    • http://files.moreheadtheatre.org/uploads/1/3/2/6/132681342/2ab6a3cc2.pdf
    • http://ravarebak.classicarcaderenovations.com/uploads/1/3/0/7/130776542/62020.pdf
    • http://files.jennuineguidanceandhealing.com/uploads/1/3/1/4/131406717/wetodobagi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/3972700470.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/24364076414.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/kuvuzupelireronuve.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/alginac_bula_anvisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/44914653869.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/73765949741.pdf
    • https://cdn.shopify.com/s/files/1/0450/6094/8118/files/ccna_study_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/maven_skip_tests.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/27966470537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/fajetekamogilawovotozid.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/cetoprofeno_100_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0430/3935/9127/files/gerewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/mononomeruzonigosejure.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_off0000545a.bin
c23ece5a68cdb7bedc33791b410fdbaba300627218bc8ae27c3cc8abfdee13f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545A 5304 bytes
font_01_sfnt_off00006657.bin
218616d2be5b533abc1231111e51d9a8851dd11c2bdd13e1c868ccb52c86a093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6657 10904 bytes

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