Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98f4ce850241624…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 12:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36d63f44a9deb9d1ec83f2650a4e91d SHA-1: 8b8493c0c3089d17fcbb6be052aeb3b23eac0032 SHA-256: b98f4ce850241624134c1b05a270f83a1fe28acfba6d72a8c5897f7f3154be70
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm or redirection tactic. The primary malicious URL identified is ttraff.com, which is likely used to obscure the final destination of the attack. The ML classifier also strongly indicated maliciousness.

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=indivisible+iron+kingdom+guide
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/29313531858.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/tyranid_painting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/all_i_want_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/fujujolumefujoteroxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/not_enough_items_1._6_4.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/darerawevupaloxegapoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/tuxigumofew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/lesson_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/kevivoxenajukumudukebusik.pdf
    • https://static.usrfiles.com/ugd/37321e_e57b184d2aa14aae853175328e9a6991.pdf
    • https://static.usrfiles.com/ugd/837d34_f927bfced87343848d5b350e79fe0c18.pdf
    • https://static.usrfiles.com/ugd/6a7407_45d6994a9b2940ee871f4964d5501d60.pdf
    • https://static.usrfiles.com/ugd/83e24f_faba9efc826a4932804f079c1b901837.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_f236f4a25659408b8ceb35e96ebc7c6a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fc0.bin
e746b4ca39e45cd583fdc8e891ac063316c99631fcde2110e90f64554bf2f950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 5136 bytes
font_01_sfnt_off00008129.bin
1d0de43ce5d94c537938c92fb4afb0c3fe24d4810b10f4bd44d11357676252e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 10040 bytes

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