Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca9b2a5962ddd4a…

MALICIOUS

PDF

34.2 KB Created: 2020-08-05 09:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7179db602878d8462370dd0dc2a46a4 SHA-1: 835e70f739ece6b0d1b3e95ba42d699c0368bc1e SHA-256: 1ca9b2a5962ddd4a7777b565d298124bb61836230144c7a97d9d024e60a80390
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. This URL is used in a lure to download a PDF, which itself contains a mass of external links, many of which are SEO-themed. The primary malicious link is https://ttraff.com/pify?keyword=the+human+brain+coloring+book+free+pdf+download, which likely leads to further malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=the+human+brain+coloring+book+free+pdf+download
    • http://files.brightonebikes.co.uk/uploads/1/3/1/4/131438046/6496416.pdf
    • http://files.blacklaceandpearls.com/uploads/1/3/1/0/131070845/jobakonejadorogaxuw.pdf
    • http://files.tradelinegenie.com/uploads/1/3/1/6/131636978/wopatirifozup-suxitevakur.pdf
    • http://files.williambmusic.com/uploads/1/3/2/7/132741535/2245940.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9623/files/vexajebexopagiwugox.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/81169880041.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/20082989642.pdf
    • https://cdn.shopify.com/s/files/1/0446/3548/8419/files/python_brute_force.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/jidovujazutaketegego.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/44356883304.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/fire_emblem_warriors_unlock_lyn.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/51642747747.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/c_interview_questions_and_answers_for_freshers_pdf_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/ppap_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/barbarian_days_a_surfing_life.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/82851086711.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_off00004935.bin
0036a972f84a86a1d6da1863cbd76853f459646f5602bfe9949b3a7c02e2344f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4935 5636 bytes
font_01_sfnt_off00005c3d.bin
48ac2911ddf9bbe0daedf79681dbc93a54f5ef0731c63949c5bcad5ca972bbe7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 9168 bytes