Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea63281b96d28043…

MALICIOUS

PDF

48.2 KB Created: 2020-08-23 07:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 131fb27b3bd6971e617f6000d7a317e9 SHA-1: a4fefeee1191663b974e511d62f2adc69b1e19c0 SHA-256: ea63281b96d280432261f14cdd9d5ecd3105bc60d10349b4b96ec6199aca97f2
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, another critical heuristic identified it as a PDF link farm, with numerous external links, many pointing to shopify.com domains. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.com redirector URL.

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=2018+house+albums
    • http://files.charlierobertsillustration.co.uk/uploads/1/3/0/8/130873715/kuziza.pdf
    • https://cdn.shopify.com/s/files/1/0437/3771/0744/files/77528301882.pdf
    • https://cdn.shopify.com/s/files/1/0432/5690/5885/files/4119497401.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/wow_affliction_warlock_guide_bfa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/67277900578.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/cooking_burn_levels_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/38388264174.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/iehp_prior_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/jiwikokokipidos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedapefe.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_off00007dda.bin
ee364230553fca80186331ac020548204aecddcb77255111965ce214410071c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDA 5392 bytes
font_01_sfnt_off00009003.bin
266d47fe224e2bc25f9b9480209087d71e2d9af1208e08e11061f916ee3bb5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9003 10264 bytes

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