Malicious PDF — malware analysis report

Static analysis result for SHA-256 778f661d35fab782…

MALICIOUS

PDF

58.1 KB Created: 2020-07-22 05:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f20c859f429dd50854f368c40c4e35b4 SHA-1: 932da1050e7cbad712a51e41a8eccf6c977c0d01 SHA-256: 778f661d35fab7822c9fb7282837eca6bb0490add0ed1ee824b2f9d98010b855
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, appears to be related to search terms, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=antonio+gramsci+prison+notebooks+pdf
    • http://files.colinblumenau.com/uploads/1/3/0/8/130814706/sitarezevafof_bitagurapezez_wudevejakuga.pdf
    • http://files.bookpod.com.au/uploads/1/3/0/9/130969659/burasumejasibu-kefup-titexerite.pdf
    • http://files.create-and-decorate.com/uploads/1/3/1/1/131164479/87fb34cc762a156.pdf
    • http://files.annadivesta.com/uploads/1/3/0/7/130740298/sadutogi_xanife.pdf
    • http://files.vedajess.com/uploads/1/3/0/7/130776142/fexaziletexadir_xavoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/papusakatukuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/80487087019.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/goxifitevovilomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/80330163764.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/dudinujiwazupufezaribax.pdf
    • https://gavedokoboli.files.wordpress.com/2020/06/80784540230.pdf
    • https://jararevus.files.wordpress.com/2020/06/40908383251.pdf
    • https://zijolaraf.files.wordpress.com/2020/07/jotujijunanupoginepawijon.pdf
    • https://xoduwataneno.files.wordpress.com/2020/06/vetinariza.pdf
    • https://nemogodulivo.files.wordpress.com/2020/07/denowadazabovuxetipufonu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/37655374400.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/55226321315.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/54871519082.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/23918731958.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/lumododoxodavuworu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/waxuwoxupekesobojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/femexugoxamabupaderobobod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/riwoxipukitow.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_off0000a2fb.bin
a2e521a023fa2151944ea71d024c61c066a101263e1a998f0588ce387654a154		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FB 5424 bytes
font_01_sfnt_off0000b54b.bin
73e7f97b321adaff236831214f8acfac26de9d557e533777f73c4a3a8f6e1744		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB54B 11052 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.