Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd1c5c633c0f67a…

MALICIOUS

PDF

52.4 KB Created: 2020-08-17 07:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e717c676bbbe5a04ab6f3d2ae4f2d7 SHA-1: 428f3c5f0cd4d4a12a189b487e027ebd9e518563 SHA-256: 0cd1c5c633c0f67a6a97cd236f3ed113ae7315bd48494bcbc63f27c408243f29
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by a machine learning model and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, many of which are hosted on Shopify. The primary malicious URL identified is ttraff.com, which is likely used for redirection. While no scripts were extracted, the sheer volume of links and the malicious redirector heuristic suggest an attempt to lure users to malicious content.

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=afl+finals+series+2019+format
    • http://beretelam.lindanguyenportfolio.com/uploads/1/3/0/8/130814310/rezizubevorud_fulasupobodeg_vefabujiw_vewejagudufe.pdf
    • http://xokunema.hhsmusicboosters.com/uploads/1/3/0/9/130969335/xarinovebiku.pdf
    • http://lerif.nishati-healer.org/uploads/1/3/2/6/132682883/gabokani_vevodik_tivapifonof.pdf
    • http://files.english3000.org/uploads/1/3/1/6/131637374/bewajasasabozej_kiwuwukaduwelev_neruti_sazeve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/tojovibew.pdf
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/human_body_systems_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/9438859350.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/laruxaferajix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/vosezezo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/45594431328.pdf
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/c._m._s._e._d._medicine_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/30650893594.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/97103500702.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/hinario_caboclo_guerreiro_vo_corrente.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/action_verb_list.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083ce.bin
f45dde05e40ab978e48ca80d751fc2ffe65e24079af34a4ea36515cbc1ebc34a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 5384 bytes
font_01_sfnt_off000095fe.bin
3e7c47e072c786ee1008e2971930af84f492ee8d3e9847496c70bbaf2e18a01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FE 15156 bytes

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