Malicious PDF — malware analysis report

Static analysis result for SHA-256 4755b63b85cfb5e2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 18:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7bd328c1d0c940e8456f8fd7a43b7b2 SHA-1: 1a4bb71704fa86e2bdd51baf80a703b59ae6a571 SHA-256: 4755b63b85cfb5e251277a68fbe6b06ddcab2aa4196de84b99c3d392633e48b2
152 Risk Score

Malware Insights

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

The PDF contains a link that directs to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a game guide. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious URL. No scripts were extracted from this sample.

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=persona+4+golden+yumi+social+link+guide
    • http://files.foreverlivingdeliciously.com/uploads/1/3/2/6/132695832/90006b20bef10.pdf
    • http://files.fenorfoods.com/uploads/1/3/1/4/131438316/6133363.pdf
    • http://fosimal.kaijumama.com/uploads/1/3/0/7/130739415/402422.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/19389441921.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/71338513976.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/47054939309.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/66414345813.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/que_sera_sera_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/19326716116.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/43302369147.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/48719590716.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/64844736922.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/pipe_band_tune_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/pdf_acrobat_reader_download_windows_xp.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c2.bin
456fdbcdc37e5c75793c6f1dea09340b22cc122510db8c3b84ef0c63542aa1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C2 5316 bytes
font_01_sfnt_off00006bbb.bin
4dd5674ee4bcb8f0b00f5a4631043e89763027d9325a568d27e0fca90d282144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBB 10296 bytes
font_02_sfnt_off00008ecf.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 4324 bytes

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