Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af1b6847d12b6ca…

MALICIOUS

PDF

34.2 KB Created: 2020-08-02 19:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de4327737a98cee61395d1c6e8137935 SHA-1: 78d46e2effddda1ffca86296ae227cbee4c5575d SHA-256: 2af1b6847d12b6ca40a4d0c3e0b9dc867fc3275e218e9e95a592e30172c58514
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a service manual. The document also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.cc/pify?keyword=power+gear+parts+and+service+manual
    • http://files.mrsheridanenglish.com/uploads/1/3/2/8/132814427/vasov.pdf
    • http://files.barronparkpreschool.com/uploads/1/3/1/1/131164198/linupowipona_jerowanino_lulomerow.pdf
    • http://files.carsontheatre.com/uploads/1/3/2/6/132682820/botonugata.pdf
    • http://files.irisandtheivf.com/uploads/1/3/2/7/132741155/sipemegujin.pdf
    • http://files.affordabletowingnearme.com/uploads/1/3/1/3/131383297/pazijinageganoz_lerotudajoginoz_suxevoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/26906795502.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/najifanejum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/27420138184.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/luwawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/punojumoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5040/files/90103477935.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/zogisaloravow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/da_form_3032.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/ronawukos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/lidepig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/36305935665.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/zojikijaje.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/tepulamo.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_off00004744.bin
129561c9c4f85e69a376ddc289bc9006d23cfd127201d211347e334219ba08f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4744 5544 bytes
font_01_sfnt_off00005a25.bin
68cbe9e1dc4e5bc9088116dff3e4223d849ef13acda55340dbabf7bee013e9c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 9332 bytes

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