Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b48d7338e61df6…

MALICIOUS

PDF

50.6 KB Created: 2020-08-28 05:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649699bc7f709efe03eb7305ff4154a8 SHA-1: d4f2a4bcb2977892a01c4c13faa9a382915b2dae SHA-256: 68b48d7338e61df6a32162697db18c5a4bb22374f3e0860e40e71610c7580e56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive title '74 is the new 24' and embeds a large number of external links, many of which point to potentially malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.ru/pify?keyword=74+is+the+new+24. The ML classifier also strongly indicated maliciousness. The document likely serves as a link farm to distribute traffic to malicious sites.

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=74+is+the+new+24
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdf
    • http://files.policyandinnovationedinburgh.org/uploads/1/3/0/8/130813317/4740490.pdf
    • http://xabob.antoniacundy.com/uploads/1/3/2/6/132695219/zemimonofeba.pdf
    • http://xaziza.osolnikmachinery.com/uploads/1/3/2/6/132682035/bulilopowigu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8218/6905/files/ashtanga_yoga_sequence.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/benefits_of_effective_reading.pdf
    • https://cdn.shopify.com/s/files/1/0432/0552/5661/files/softball_tryout_evaluation_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4974/5558/files/4193098656.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/jilixawuzazeregedefuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/superman_returns_game.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/attestation_de_vente_de_terrain_entre_particulier.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/dns_server_clash_of_clans.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/cm12_oneplus_one.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/download_legend_drake.pdf
    • https://cdn.shopify.com/s/files/1/0440/1777/8838/files/cdc_vaccine_safety_sheet.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d87.bin
981d7bbdff6a773725b28d57065f23ba2853fce8821611cbb042105fec39aac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 3540 bytes
font_01_sfnt_off00007a1f.bin
3eef0c73b44be55379573f6c4819f59d088248a1dd4e730e275240d2b8ef0a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 4412 bytes
font_02_sfnt_off00008920.bin
4f3574ffb6c0b561eec2f7bc209ec82766cb36029acd40dbcb1b801452f7d9fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8920 11348 bytes
font_03_sfnt_off0000adec.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADEC 4324 bytes

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