Malicious PDF — malware analysis report

Static analysis result for SHA-256 be73333508da578c…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 13:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0446b32a50df26c542d68303f571a50 SHA-1: 2d82f567cd673f30592aa90e6ae3bd663a7bac83 SHA-256: be73333508da578cef9dd54ef6887f79d52f54383b656c445c80ab79ea6bba24
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, includes this URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection tactic. The ML classifier also 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.cc/pify?keyword=oregon+ducks+football+news+bleacher+report
    • http://ludaxig.blockislandhoney.com/uploads/1/3/0/8/130813765/de719cdc00d60f6.pdf
    • http://kopubu.eatrighttidewater.net/uploads/1/3/2/6/132682878/a0af8caea119fc0.pdf
    • http://sexileb.armillerdesign.com/uploads/1/3/0/7/130738943/c434ea1d19827.pdf
    • http://gevuga.annayeroshenko.com/uploads/1/3/0/8/130813747/7187198.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/after_effects_keyboard_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/11029756775.pdf
    • https://cdn.shopify.com/s/files/1/0433/6975/8874/files/solomon_islands_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/4084/9575/files/19162431242.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/ch_3_science_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0461/4026/0505/files/azure_app_service_editor_files.pdf
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/povexavudasomotek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/bcci_bank_scandal.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/27308305734.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/43345797563.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/7835538692.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620e.bin
792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620E 6568 bytes
font_01_sfnt_off0000725b.bin
3517f0cf81f2555ceeeddef8caa989d99ccb7eb3ca00e33f02dfa602f8409c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725B 5740 bytes
font_02_sfnt_off000085e2.bin
279c37fcabba51aac6d2da334e904db04caff73ea0fe0e33b42da9ccacbeb2f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 2144 bytes
font_03_sfnt_off00008fa1.bin
30f35ade60f582080637b96eab15e2d4312765a94ffca131bca4a449fc67cbea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 10228 bytes

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