Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda898c0fe717e33…

MALICIOUS

PDF

54.7 KB Created: 2020-08-24 18:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54918496f788816bdbd34fb2cc855607 SHA-1: 9a1901750da29de75be78d970bf2a23d36c93482 SHA-256: cda898c0fe717e330bb7757d1434b0bf2bd917e1cc89963e17252b7f9a0d60d9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is the primary attack vector. The document body, though heavily obfuscated, contains text related to 'sound of silence piano sheet music pdf' and a URL that appears to be a lure. The embedded URL https://ttraff.cc/pify?keyword=sound+of+silence+piano+sheet+music+pdf is flagged as malicious, indicating it leads to harmful content. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links.

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.cc/pify?keyword=sound+of+silence+piano+sheet+music+pdf
    • http://somone.suzannetank.net/uploads/1/3/1/3/131398008/c2c2ef6e280.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/16793404407.pdf
    • https://cdn.shopify.com/s/files/1/0458/5488/3993/files/blastoid_transformation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/cereal_crop_production_in_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/every_step_you_take_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/53845793979.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/poveguganolizoruwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/45712777191.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/93840192799.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/buvufebuwutedup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/bijugafuwodogira.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_off00006568.bin
7a2594a3335b021e53e77040f029dedbcabd6428b39a046aedbdc8cf11e0ae1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5400 bytes
font_01_sfnt_off00007793.bin
af9b44aee67224c950faa95e2178b7af2dd42cb503c60bad512db032b033151b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 5996 bytes
font_02_sfnt_off00008bee.bin
316b845cec60c9bb7414c810365203b923d03a1945657ac91763905787ae96d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEE 13368 bytes
font_03_sfnt_off0000b6a9.bin
cdf8bffa4407cccbddd6f4a6c8fc97381afabe13c22740c61fd6cbca745293a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A9 16608 bytes