Malicious PDF — malware analysis report

Static analysis result for SHA-256 2243c553aec63392…

MALICIOUS

PDF

65.8 KB Created: 2020-08-23 21:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a691be47bf66bdf5055cac859e29ba2 SHA-1: b3a5ff0c585372db875aae2d5d56e1d6e0397f0a SHA-256: 2243c553aec63392e0568c925fa58153212a894a299ab14baf15612f386f2925
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=intermolecular+forces+chem+150+activity+answers'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'https://cdn.shopify.com/s/files/1/0450/2165/9286/files/abiy_ahmed_book_medemer.pdf'. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=intermolecular+forces+chem+150+activity+answers
    • http://rixenabe.thecollegiatechoice.com/uploads/1/3/1/0/131070420/tupiroveb.pdf
    • http://files.hordlevoluntarycare.org/uploads/1/3/1/8/131856769/1185162.pdf
    • http://files.stormriderswindsurfingclub.com/uploads/1/3/0/9/130969826/6335791.pdf
    • http://files.sustainmizzou.org/uploads/1/3/1/4/131453950/85b70.pdf
    • http://kowep.nexustherapies.ch/uploads/1/3/1/3/131398027/milebiraxere.pdf
    • https://cdn.shopify.com/s/files/1/0450/2165/9286/files/abiy_ahmed_book_medemer.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/81725562316.pdf
    • https://cdn.shopify.com/s/files/1/0431/6918/5943/files/2019_daily_calendar_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/vagixobigofimodaparazib.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/blacksmith_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/bozebemugefemikikifezop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/naxuvivukesatomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/iata_airport_codes_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/metujegazuvedupebuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8782/files/vargmul_and_ghanmul.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/performance_parts_2005_honda_civic.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_off0000ae10.bin
274324911e8decf7ffcd9826f7e1f9cf4f5072d839f40ae922f2957c9f460e32
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE10 5632 bytes
font_01_sfnt_off0000c128.bin
09b8c8fcc26c8005c2f5eff4a88ea2c79f16f42edcb5ec5b96815cc7e0c05c48
pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 10320 bytes
font_02_sfnt_off0000e492.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74
pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 16060 bytes