Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a562597ac228ed5…

MALICIOUS

PDF

43.8 KB Created: 2020-08-24 09:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc5e13404997a467a73d93824b027c0 SHA-1: c01fb046f404cf36f66df9b34779f3ca4de19ea0 SHA-256: 7a562597ac228ed534c1d037f68c987cc8f784582825bc6e122411e65a82797c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a flyer template, which points to a large collection of other PDF files. This indicates a link farm or SEO spamming campaign, likely intended to drive traffic to malicious sites or distribute further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=lorem+ipsum+flyer+template
    • http://files.graftonminorhockeyassociation.com/uploads/1/3/1/4/131437306/venizorigu.pdf
    • http://widapiwe.ecogpainters.com/uploads/1/3/1/8/131858661/6c4c6268.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/noxenubababoliparafemoz.pdf
    • https://cdn.shopify.com/s/files/1/0453/9642/6920/files/walotapinatepemukub.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/gobajif.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/ddp_yoga_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/pepagap.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/45973702883.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/2009_honda_cr-_v_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/defifafujeremoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/jonanaraxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/fexebimi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/7zip_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/hollywood_action_movies_in_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/jopabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/jakuwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c25.bin
30b56bfc1ba5f1d045d98d8f51b12060fd36f556f92a4231827ac3b8d122a955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C25 4868 bytes
font_01_sfnt_off00006cbb.bin
7d90e12b5b46c6919a0146fd0265635f1d7f1a04f4241d9eb9472d010c2e0b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 12468 bytes
font_02_sfnt_off00009433.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9433 4324 bytes

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