Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99f82b70dbe12e7…

MALICIOUS

PDF

38.2 KB Created: 2020-09-01 07:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d887f7980dafbc1ffdc729eda5529f4f SHA-1: 3d79b491cbf30584f4a52f6075273fb700eb8dbb SHA-256: d99f82b70dbe12e7f9cc19969cd92d786c68557fc45dafa11ad9c0a01be26fe4
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its extensive use of external links, a technique often employed in SEO poisoning or phishing campaigns. One of the embedded URLs, 'https://ttraff.com/wix?keyword=datasheet+display+7+segmentos+anodo+comum', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=datasheet+display+7+segmentos+anodo+comum
    • https://static.usrfiles.com/ugd/a838c0_e678ee3c062941328cdacfbdca15b9f6.pdf
    • https://static.usrfiles.com/ugd/e4a001_4e7c0d70ce4a43cd8299e6f4cddb175a.pdf
    • https://static.usrfiles.com/ugd/b8c837_99629299280b4f74b9c96dbba9db3d3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.pdf
    • https://static.usrfiles.com/ugd/764aaa_e7ff017028e746c9bd07c4f2bcf45909.pdf
    • https://static.usrfiles.com/ugd/837d34_70e11623ba6c48199c83c523d33ed5ca.pdf
    • https://static.usrfiles.com/ugd/a01749_fa480f4be38e49f6a36930d374542035.pdf
    • https://static.usrfiles.com/ugd/f967ac_2c0e7f5363834f55bc96f4ad68db315d.pdf
    • https://static.usrfiles.com/ugd/e02969_fb4e99b75d8841ee9b399f17a0bf2d09.pdf
    • https://cdn.shopify.com/s/files/1/0430/9807/9399/files/vanaspati_jagat_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/gufeworotutazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/pekosot.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9494/files/clicker_heroes_transcendence.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/jevuvuzile.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f20.bin
feae430c2030fb28e584ee7730b0356f4fb33500415ce0e4e717c5be5fa17cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 5572 bytes
font_01_sfnt_off0000720b.bin
3d2777d20ab8df17bfeafc151ae7ed9a77104b71c5ea63b4e9c7e3aa742ebefe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720B 10328 bytes

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