Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea609e973ca4afb7…

MALICIOUS

PDF

57.1 KB Created: 2020-09-17 01:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07baeb1ed85db7470a0ea6affe42a754 SHA-1: 3b7f8530a4d4c2ead5a0e6069218e9c94953f3fe SHA-256: ea609e973ca4afb7be18d869c820b1c84bfc1b1cb6131d34d006c0c28a5b43ab
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body also explicitly contains the URL 'https://ttraff.link/wix?keyword=btd+6+apk+download', suggesting a lure for potentially malicious downloads. The presence of a large number of external PDF links further supports the classification as a link farm, likely used for SEO poisoning or distributing further malicious content.

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.link/wix?keyword=btd+6+apk+download
    • http://nepaxu.yesindustrialsupply.com/uploads/1/3/0/9/130969280/212746d.pdf
    • http://radegom.mickkok.com/uploads/1/3/1/1/131163635/wopajuriwomasojamaw.pdf
    • http://files.hccrs.org/uploads/1/3/1/8/131858287/rilagumudavima-mirelomafubabul.pdf
    • http://xirim.cathyanneross.com/uploads/1/3/2/7/132712116/wikib.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/step_2_ck.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/55910169755.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/barbie_games_apk_offline.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7185/files/web_browsing_history_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/3120766444.pdf
    • https://cdn.shopify.com/s/files/1/0447/7632/5286/files/alicization_rising_steel_reroll_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/jodorowsky_way_of_tarot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/21417170395.pdf
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/zibukekomojapurixudu.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/
    • https://cdn.shopify.com/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007a60.bin
d33ceb765670dc239a3e5ddf133a49bb01584ea1322afacb9510c4e4b9466c85		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7A60 12712 bytes
font_00_sfnt_off00006920.bin
d1f296f7ee78cb62e933dac9f666a6eaaa1926ebb6557062cf53f618e43abf1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 5036 bytes
font_02_sfnt_off00009e77.bin
c053739f560f39a419e283559e1f3b7deee5bb221e7e978d67a46d0f589112cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E77 10272 bytes
font_03_sfnt_off0000c1b1.bin
7a8d8a38d607c9bdd80b9913bc08d848e6f19ee61167c2c7551fc905f808dd7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B1 16136 bytes

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