Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6a55f3fdf892b7…

MALICIOUS

PDF

51.6 KB Created: 2020-08-18 20:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cbf3216d08bfa458b0dcd7805ee9a2a SHA-1: b597a5eb2a33baf193ede8586e8a3a381dcb619b SHA-256: cd6a55f3fdf892b77f42dcab6c145c32257b894e507b70d7412421f9f4ae3cc6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/pify?keyword=dragon+nest+mobile+guide+assassin, is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body is heavily obfuscated.

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=dragon+nest+mobile+guide+assassin
    • http://files.balance-bicycle.com/uploads/1/3/1/4/131406222/8170486.pdf
    • http://files.4lifeinc.org/uploads/1/3/0/8/130813821/mevebi_vumiji_maripopas.pdf
    • http://files.pleasanthillartcenter.com/uploads/1/3/1/3/131384424/sedapadomaf.pdf
    • http://bufajiwen.popgalleryorlando.com/uploads/1/3/0/7/130776366/f980ef59.pdf
    • http://files.beneathawp.co.uk/uploads/1/3/0/9/130969710/zaraxovipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/rpp_descriptive_text_smp_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/84067272494.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/xasedezulufuxuvivukipofon.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/aaron_boone_yankee_uniform_number.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/grade_5_decimal_division_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/54300908215.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/willingness_letter_to_join_job.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/89969271212.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/95553512493.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/62780836327.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_off000076cf.bin
54d5201cb5fad70f242ccaf2ea390e9f81aa50595ad4749a653b6540491cc0a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 5284 bytes
font_01_sfnt_off000088a7.bin
c80d7b136a72351ea767c494b55b4325dbb9afef4c38cb5060b332818f76ef5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 10312 bytes
font_02_sfnt_off0000ac2c.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2C 16092 bytes

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