Malicious PDF — malware analysis report

Static analysis result for SHA-256 48acef82adff538c…

MALICIOUS

PDF

38.4 KB Created: 2020-08-03 11:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccbd5881822d54838b7cb9d598311bac SHA-1: f28a49914586e1575820f286bb9d2392c56c80eb SHA-256: 48acef82adff538cb02c3fa74f766fdeaf88912d421aa559ed51d0acd7d61ec6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to obscure the ultimate destination. The primary malicious redirector identified is ttraff.ru. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a social engineering attack pattern. 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.ru/pify?keyword=temperamentos+test+pdf
    • http://files.messagesfromthewoods.com/uploads/1/3/1/3/131380126/9892176.pdf
    • http://files.nmtiasf.com/uploads/1/3/1/4/131407051/xetomekukuw.pdf
    • http://files.balancedwaw.com/uploads/1/3/1/6/131637853/tukon-retopovako-tilonoxin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/lojurunijebonuxamagogibe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/bleach_fade_to_black_eng_sub.pdf
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/83934646633.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/nakozulibewepovujulurub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/posewivipuresipagudijafan.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/70875610599.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/filomilatumafodewoz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/gexesujezakirizokomapis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/felifabop.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/sajijuzuwunaxevokajo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/gagodotunugibusixuwuvu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/vomozisazepemotovenax.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/5020812939.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/63458517663.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_off0000586b.bin
ed20387846545085961a1b6bdfa6a1b2285a0f5f6e40a6aa51cae1932bc8eff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x586B 5104 bytes
font_01_sfnt_off000069aa.bin
267f2a33240414bca7778352b308f6ac936dee0b80d3990dd67c167518b2b755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AA 10548 bytes

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