Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6ac11d0abfa1ab…

MALICIOUS

PDF

44.1 KB Created: 2020-08-11 22:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2f90ca907948ea9ec3f65e35ad55507 SHA-1: d895b459a1b727a9bbe25a120857959f63cedf33 SHA-256: ce6ac11d0abfa1ab70c00e566c5ebc3c33a1bfb7cef553c286608507159aab99
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at ttraff.com. The document body, though partially corrupted, contains text related to a 'Scarlett 18i20 3rd gen manual' and the authoring application 'wkhtmltopdf', suggesting a lure to download a fake manual. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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/wb?keyword=scarlett%2018i20%203rd%20gen%20manual
    • http://files.jake-hill.com/uploads/1/3/0/9/130969965/zopive.pdf
    • http://files.modelrailways.tv/uploads/1/3/1/4/131452958/3972508.pdf
    • http://files.dakotasdogs.com/uploads/1/3/1/3/131379832/4953109.pdf
    • http://files.mobilhomebluesky.com/uploads/1/3/1/4/131438718/nowurevosuvik_supulowataluwa_takuxuwi_kuwid.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/jekuzunixebomus.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/jesomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/21617721958.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5715/files/75776072893.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/85636265660.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/a_very_potter_sequel.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/rosatuweru.pdf
    • https://cdn.shopify.com/s/files/1/0428/7696/0924/files/71197707197.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/pig_latin_to_english_translator.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/31967700793.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_off000067ab.bin
0db8b9805aaf92e1fe97c670f0984ab01bc7d5426830f08959cd51588943b66a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 5868 bytes
font_01_sfnt_off00007b82.bin
bc2bcfb4551e01a668d934710ddee2c028de2181780052e8e0aed55140ea7bc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B82 11900 bytes