Malicious PDF — malware analysis report

Static analysis result for SHA-256 265d8776c4696df1…

MALICIOUS

PDF

49.5 KB Created: 2020-08-07 00:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f41557d33c687cdd00b558bfff76bdc SHA-1: 73bd5668744ad0bc4e35ccb78c070acb9a2430dd SHA-256: 265d8776c4696df10e590a565c5ba3e02ecf4d63f872d0ec782cb9c14b33d817
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body text, though partially corrupted, contains a phrase related to 'books on essay writing free download pdf' and a URL that appears to be part of a link farm designed to attract traffic. This suggests a social engineering lure to drive users to malicious sites.

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=books+on+essay+writing+free+download+pdf
    • http://files.offthebeatentreks.org/uploads/1/3/1/6/131606016/4123422.pdf
    • http://files.color4home.com/uploads/1/3/2/6/132683334/pivujizije.pdf
    • http://files.richellewilliams.com/uploads/1/3/2/7/132710627/dikodavinipapep-pekatito.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/6675558165.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/renew_texas_drivers_license_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/tozizerazogadawazisesevi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/caballo_viejo_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/zevosisazuronusesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/volume_of_parallelepiped_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/2598/9785/files/aaa_style_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/duvulewisok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/caring_for_your_baby_and_young_child_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/16226198357.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_off00007553.bin
c328518c0bd5eceeccd8626d59b3df9e26adf8ddc6b8e3090904cd869ac2f536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 5304 bytes
font_01_sfnt_off00008786.bin
6cec2fca121ebaed5e5db65d903b70f752f23147056e9280975fa29f8ac52928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 10420 bytes
font_02_sfnt_off0000aae6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE6 4324 bytes

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