Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa32c6c4990b3f1…

MALICIOUS

PDF

62.0 KB Created: 2020-08-19 12:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f201dfec351ae3395e9579c5e319d5b6 SHA-1: 28fa0bf238fcb41816f833de7bff96482ba9f2d9 SHA-256: 1aa32c6c4990b3f163a76fa553d7850abd19a4464103bf9b306609e9e648a491
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via the embedded 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.com/pify?keyword=daoc+phoenix+albion+lvl+guide
    • http://files.nourishinglifewellnessclinic.ca/uploads/1/3/1/4/131437242/2038087.pdf
    • http://nemot.kog.cc/uploads/1/3/1/0/131070306/nanezopefixote.pdf
    • http://nixeki.surrenderedtochrist.org/uploads/1/3/1/4/131454859/lupivupuvazirav_mekagege_samujolesezifa.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5981/files/72591809142.pdf
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/analyzing_graphs_of_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/jentezen_franklin_fasting.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/92757647844.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/vetazaruferetatagegiros.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/fundamentos_de_fisico_quimica_castellan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/28283621680.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/pimeteweramojikije.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/fowowefes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/10625926709.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/anesthesiology_ielts_answer.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_off0000a7e8.bin
7d2b2556a3b21a752dcf25ef4a41f2747520718d6e9aa04887341ff830987389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E8 5132 bytes
font_01_sfnt_off0000b950.bin
4830074770cabba6250296f4cbfb6c8012354d53a3bc4ba98eca17a5d025831a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB950 10360 bytes
font_02_sfnt_off0000dcae.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 4324 bytes

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