Malicious PDF — malware analysis report

Static analysis result for SHA-256 10541d65d4b7b38a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-11 16:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95445ceefcd05f8a8a12da89f805489b SHA-1: 2a3e4039e948b63c57050cb2b868673c853f1f4f SHA-256: 10541d65d4b7b38abc509b0a6f8a7c88e81be9defdbbb0f02a91ce81de006cce
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 malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=carprofeno+en+perros+pdf', which is used to obscure the true destination. The document body and embedded links suggest a lure related to veterinary information, likely to entice clicks on the malicious links.

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.cc/pify?keyword=carprofeno+en+perros+pdf
    • http://fezob.mobarts.org/uploads/1/3/1/6/131636725/sevem.pdf
    • http://files.skytravel124.com/uploads/1/3/0/7/130739369/nurop.pdf
    • http://files.wycombeparanormal.com/uploads/1/3/0/8/130814106/janujog-gajijarexo.pdf
    • http://files.mynaturalplayce.com/uploads/1/3/1/3/131379748/fezikelowofovu_ratiti_dutexirek_kopewebame.pdf
    • http://files.observatoiresolaire.eu/uploads/1/3/1/4/131455722/c778d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1139/8039/files/14230089225.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/golden_spoon_nutritional.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/12911097913.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/fijodiveperebixove.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/sajorikuxaxisidonalawapoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/logical_reasoning_questions_and_answers_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/23623487725.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/ansar_vdp_job_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/dimethyl_sulfoxide_uses.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/lugif.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/gipowunotusofo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/libeti.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_off00005f29.bin
f0a416e7fed44d51b0fe15c4e0c933e6353363e7fa4495fdab19976fe20004f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F29 4908 bytes
font_01_sfnt_off00006fe7.bin
6e2f5eabf01b6e92eb4d20e15766297226dc3cb125c81145afc0349c0ac5b4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE7 11228 bytes

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