Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a0d0b4b2e20172…

MALICIOUS

PDF

34.2 KB Created: 2020-08-23 04:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d4a94d7d267f9b5fd70b905724b2f5 SHA-1: eb3cda375ad69082926d7f960e6b0d5607e02798 SHA-256: 89a0d0b4b2e20172119f4bbf4e166cc4fe8a32932a7a27b77c09ed59a525a595
152 Risk Score

Malware Insights

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

This PDF file contains a significant number of embedded links, many pointing to Shopify-hosted PDF files, indicating a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier strongly flagged this PDF as malicious, suggesting its primary purpose is to distribute or redirect to harmful content.

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=bump+of+chicken+hello+world
    • http://xaseruvop.forumartspace.com/uploads/1/3/0/8/130873851/guvojaweneseza-femeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6324/files/84994002646.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/rafewofetaguwegepetuxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/cesarean_scar_pregnancy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/bendy_and_the_ink_machine_android_review.pdf
    • https://cdn.shopify.com/s/files/1/0451/8169/8199/files/ccie_cisco_lan_switching.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/91100040591.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/89871137206.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/como_aprender_ingles_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0431/4290/6007/files/bible_chinese_english_bilingual_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/8840/3862/files/12242301988.pdf
    • https://cdn.shopify.com/s/files/1/0439/6161/4494/files/affairscloud_monthly_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/12151751765.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_off000049a1.bin
70e2207a433a65cf144d4811343947add1353d1f4f3f254cdb818322bd1b090d
pdf-font-stream PDF embedded font (sfnt) at offset 0x49A1 5212 bytes
font_01_sfnt_off00005b4f.bin
6c110655b342ffea5264b139997618f1c4b056ec427c5e57f471c48cc4e84b1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 9692 bytes