Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dbadd4be6e9e84…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 00:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d079ead94729a61176f1da71fc10194 SHA-1: 8dd0e2bd51b6466d50de3c1af53249d8c5c77f7a SHA-256: 93dbadd4be6e9e84a85461bf41443038a954ab3b1487bd3fac57190f662e45db
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One prominent URL, https://ttraff.com/pify?keyword=android+bottom+navigation+bar+disable+animation, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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=android+bottom+navigation+bar+disable+animation
    • http://files.elaionasfestival.com/uploads/1/3/1/0/131070178/8b9b5.pdf
    • http://gopiguri.novelideasbylaura.com/uploads/1/3/0/8/130873951/siselatijin.pdf
    • http://gapagugi.joycecollinscoaching.com/uploads/1/3/1/6/131606027/feniguvekufu-zifikesirupo-ludefakavasuziz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/jezamafedifujotiben.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/boom_boom_momoland_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/rijovugekugavuwubix.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/camozzi_pneumatic_cylinder_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/pitoselazoterowajawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/laluditafidufedisatovijex.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/24922407212.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/clases_de_ingles_avanzado.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/nufofuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/nozuwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/rilekagukakixeregidivewog.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/koluwu.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_off00005db3.bin
0131added6557cc65944f0a869e206c98da1295d2d1cd218d576658171a59206
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 5332 bytes
font_01_sfnt_off00006fb9.bin
767eeafdfb4f6a01f048fe0902d5b4858588904cb2df4888c4864751f7815e6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB9 9744 bytes