Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bbe3c49e143b24…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 01:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12abbd0c9616bdfb05e2dc4c0eaa0321 SHA-1: dae559d0777bfa253ed7d3debab4068682bce8e3 SHA-256: e8bbe3c49e143b24e6bd96e60212cc8f16f73f64c0d340f7a776e28151ab0629
152 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=pillow+top+sheet+sets'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=pillow+top+sheet+sets
    • http://files.chaosdragonboats.com/uploads/1/3/0/7/130739247/73a7d89a4eb250b.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/how_to_reset_ducky_one_2_mini.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/sobexelinim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/pogifafaxituvuzedufozonit.pdf
    • https://cdn.shopify.com/s/files/1/0454/7454/5816/files/jogetilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/yellow_gold_t_shirt_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/ust_to_cst.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/tazulijotagag.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/guided_math_game_plan_houston_tx.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/72432738500.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_off00005964.bin
8b9b4b3cfe70a4d6c49973d0a2ef38c7362e5bddd49062ad1dc5fe64a8defc3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5964 4376 bytes
font_01_sfnt_off00006856.bin
cf10e89cb2fad96bff812398cf773bf04a1014f50722aa486860c79b681f0286
pdf-font-stream PDF embedded font (sfnt) at offset 0x6856 10540 bytes
font_02_sfnt_off00008c4e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4E 4324 bytes