Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50782441d407041…

MALICIOUS

PDF

45.2 KB Created: 2020-08-20 07:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff7ec7c6c054c3f7faaa12a5891b4e5 SHA-1: 36e10a6b2972f14adab19f840c407ba1fe10f0f9 SHA-256: a50782441d407041a392931ceb4daf7d03bf12f30ff9b5dfa67496be422b47cb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=paris+metro+map+zones+pdf', which is also present in the extracted URLs. This indicates a likely attempt to lure users to malicious infrastructure. 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.cc/pify?keyword=paris+metro+map+zones+pdf
    • http://files.ibmypphe.com/uploads/1/3/0/7/130738998/wadonorebokow-likope.pdf
    • http://zigiraw.lifepathchurch.org/uploads/1/3/1/6/131606758/1f46f3.pdf
    • http://xujikag.lauramgray.com/uploads/1/3/1/4/131437423/3068a60d6716d13.pdf
    • http://files.daisyhillgoats.com/uploads/1/3/0/9/130969855/fagajawerowiz-jasewonimaxar-fikama.pdf
    • http://files.lastfrontiermusic.com/uploads/1/3/1/4/131453031/xezikip-kijep.pdf
    • https://cdn.shopify.com/s/files/1/0438/0839/1330/files/98509432004.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/jobuvenata.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/bestimmter_artikel.pdf
    • https://cdn.shopify.com/s/files/1/0463/0698/4098/files/biophysical_environment.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/calling_card_format_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/65690394452.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/blood_groups_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/xerasiponazekilexefifude.pdf
    • https://cdn.shopify.com/s/files/1/0462/4452/8288/files/1263881316.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0122/files/reformas_borbonicas_carlos_iii.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/
    • https://cdn.shopify.com/s/files/1/0433/3705/6411

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007180.bin
81cf2210d240ca25a4ce48cee7ff98ab15d785e99e71a2a7abea8ad5a8ee40f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 5208 bytes
font_01_sfnt_off00008328.bin
762a4d0b3f84f0321118adfd5819ea5e4357893ec7eb38cc3a4fc532cd7e536b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8328 10628 bytes