Malicious PDF — malware analysis report

Static analysis result for SHA-256 579c1a26633cac40…

MALICIOUS

PDF

37.5 KB Created: 2020-08-17 05:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 399534d268435de9365218e892ff3019 SHA-1: f3d1f58a19e0878c22e10ab853fcd9223dc8a98f SHA-256: 579c1a26633cac404d152c361ca67b8dd75d826d0940b2a7ce1abc5735763461
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, likely as part of an SEO link farm. One critical heuristic identified a direct link to a known malicious redirector, ttraff.com, which is used to lure users with search terms like 'messenger lite apk version'. This suggests a phishing or scam attempt, leveraging a deceptive document body to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=messenger+lite+apk++version
    • http://files.themilkshed-devon.com/uploads/1/3/0/8/130814169/5317598.pdf
    • http://files.kieran-madden.com/uploads/1/3/1/4/131454286/c4d2606e03f63.pdf
    • http://powuru.antjedormeyer.com/uploads/1/3/2/6/132681260/rilirutuxudivu-zurifoxogopazax-kemamoriletumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/health_benefits_of_chia_seeds.pdf
    • https://cdn.shopify.com/s/files/1/0435/1361/0392/files/42248113228.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/bolisozulekapa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/52612883542.pdf
    • https://cdn.shopify.com/s/files/1/0451/0393/9737/files/tisug.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/dizekabulivutawidodonav.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/77766091027.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/xasulobabusatugutabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/zigozojavinosabikaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/dugodo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/vyapam_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8700/2790/files/81213036935.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/avicel_pc_611.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/91053774868.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/dixivakuzen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a0e.bin
ae6bd92ab78690eaea4c7abba2d593c118f6b689db6862135f54896544da9b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0E 4904 bytes
font_01_sfnt_off00005aca.bin
109758bd74cfe1269a19adc02402d351467179b9b78128129c0ea043950f7dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACA 9364 bytes
font_02_sfnt_off00007ae7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 4324 bytes

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