Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd455bd1147586d…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 12:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b2827c9296924cdfd8b0b50492fbd0 SHA-1: a2f731cc0143d9f32c40a661982c32e24ee03962 SHA-256: 1dd455bd1147586d1de4ccd775755b5011923b477e01172e8d2b3af34fe2eba5
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to a scone recipe and the URLs, suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection 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.cc/pify?keyword=best+scones+recipe+pdf
    • http://files.seattlechronicseeds.com/uploads/1/3/0/7/130776089/9fd65eb8feb3a.pdf
    • http://files.webelievefoundation.net/uploads/1/3/2/6/132681694/5e603038c2b.pdf
    • http://files.shop-at-revived.com/uploads/1/3/0/7/130775760/9420624.pdf
    • http://files.naturalfoodcoloring.com/uploads/1/3/0/8/130873943/loxutazerazikulo.pdf
    • http://files.berkeleywellbeing.com/uploads/1/3/2/6/132695321/gajosojifozemaz-sakatobidatoj-povidezuzoren.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/tumosog.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/7386166727.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/41817400478.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/33700406949.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4683/files/carbon_oxygen_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0446/2844/3299/files/mercury_500_thunderbolt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/sotazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/vesebobama.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/dupikokenuxipotupopap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/popanexaxivomomuvunulaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/21108990059.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/kedatozopozasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/37651566335.pdf
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/64531133085.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d68.bin
d81791b3fc1d464ecbb1f0788fd8156805023fee6a44cfc6e5254d72e84d34ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D68 4744 bytes
font_01_sfnt_off00007d81.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 1800 bytes
font_02_sfnt_off0000860e.bin
6fb2acf64ff2546f0bdd423f4be80cd9266c5e8fb290a2db83c49c8bf3cdf3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 10132 bytes
font_03_sfnt_off0000a89a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA89A 4324 bytes

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