Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c82437f3c623a26…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 09:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af58ab3ca7e1c4fab21a67e6d19f2774 SHA-1: e7f0a77583198278d6d1920754f52e184fc93a0d SHA-256: 9c82437f3c623a26639f679597a06cb0e8771bd3a0fe89d66fd248c94cc4aa3d
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large farm of external PDF links. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content or phishing sites. The document body, though heavily obfuscated, contains this URL and references to other PDFs hosted on shopify.com.

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.com/wix?keyword=combat+hapkido+vs+krav+maga
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/two_player_stickman_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/tukuwofozuwosodusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/skyrim_smithing_guide_uesp.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/45782518186.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/sozegavisuja.pdf
    • https://static.usrfiles.com/ugd/b8c837_b089d3b1d70b428681402cc08f38a9eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2953501efc5942719788c1f851e7c787.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e3106e17c541dea4c45aae69730945.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee0a549f8692443f815821bb22e3288c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f034b80f0d474d84949620da31371891.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f496e21c71f4133bbef8f40766c2897.pdf
    • https://static.usrfiles.com/ugd/b8c837_fda10cddaff840628864dae0117e75c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d92bc9f4daa4d878bcc42df02d6ec80.pdf
    • https://static.usrfiles.com/ugd/b8c837_de1f308bf5e34aafbe3b8548f13ecdf3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/rearrange_pages_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/tapumunesaxezakejib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/dopowupinijuxupomojulevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/doteligoketuda.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_off00005b9a.bin
faee8abc9fdb3707bfe695a68919fa97e37d90c212138219a27081bcf1d24829
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 5512 bytes
font_01_sfnt_off00006e2a.bin
f628ff48d7a93718c26edb4dc4832209737ce8ce2907921a2693c8587d53da3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 9888 bytes
font_02_sfnt_off00009007.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0x9007 16312 bytes