Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53c51743529a4b6…

MALICIOUS

PDF

60.2 KB Created: 2020-08-30 20:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bc7cfece6c49e58977211ac8e4b0d9f SHA-1: 220ae1412aeed6a35f3dffbbeec34abfb8c5dba7 SHA-256: c53c51743529a4b65d0f175764e3521f2eb30192351de644ed60a7d5107b5e69
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL and a keyword related to programming tutorials, suggesting a social engineering pretext. The file also contains a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse.

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/wix?keyword=atmega328+programming+tutorial+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/xasavipimatevasud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/ruronasukurobusubefa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/sovanosasipi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/tda2020_subwoofer_amplifier_circuit_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/5313199012.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/free_prepper_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/latanupiwupenixom.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/naxwaha_af_soomaaliga.pdf
    • https://cdn.shopify.com/s/files/1/0449/1457/3467/files/anglo_american_cataloguing_rules_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/99779387756.pdf
    • https://cdn.shopify.com/s/files/1/0430/9817/7693/files/seal_crazy_lyrics.pdf
    • https://static.usrfiles.com/ugd/b8c837_335e42b09e474ea6aae944e6a41eac6f.pdf
    • https://static.usrfiles.com/ugd/ab059d_ed4c0b7506bc4fd9b7fa83f54e359f67.pdf
    • https://static.usrfiles.com/ugd/4dd980_110b61e9661b452ea3b13f14e83341c5.pdf
    • https://static.usrfiles.com/ugd/eb4c03_9ca1f5ae2734499fabac37e86f4e6b3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_05993c81144f4aa2b98467f1fba49b0c.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_off00009337.bin
0c71fb2c87429e0f5696aa9221cf0e0350c58a40b36a2cbdc5fde7037b9c3c84
pdf-font-stream PDF embedded font (sfnt) at offset 0x9337 5544 bytes
font_01_sfnt_off0000a5ee.bin
f8c24ffd9e857fe8ebc03caa42da5b38f9b25337747daafb9426fbb86bd754dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5EE 14800 bytes
font_02_sfnt_off0000d516.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 4324 bytes