Malicious PDF — malware analysis report

Static analysis result for SHA-256 930c60304a9d68f6…

MALICIOUS

PDF

59.7 KB Created: 2020-08-29 23:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dd48f7b5dcf8ce1c5980fae50bbc83e SHA-1: 33527da19beb09e65a863aababa79fb6fe44081a SHA-256: 930c60304a9d68f617dbf2e8f386355675afa7fb01c1dd960e973f2cfbe475ca
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a Minecraft launcher download. This is further supported by the PDF_SEO_LINK_FARM heuristic, indicating a large number of external links, many of which are likely malicious. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=minecraft+launcher+team+extreme+1.14
    • https://static.usrfiles.com/ugd/b8c837_92d19a79efe345d0bc8ffa3f4fb0913e.pdf
    • https://static.usrfiles.com/ugd/b8c837_83ed7fecf43645cf9dda821df40c48f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35b832cc50148b8aeebe5931d5bafee.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a0d2140dc5c485c8c0658163308a9da.pdf
    • https://static.usrfiles.com/ugd/21e6f2_af645b26e8ca4c9c802c667d2b971c0c.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/how_to_uninstall_parallels_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/29499135905.pdf
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/ciao_scottsdale.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/maladie_de_charcot_main_de_singe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/luwifumolusarerobob.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/6123549409.pdf
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/3789851500.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_off0000939d.bin
ce64fd3b2856a8f4610386fd4e0ee0791ea6e5e52a231d4af138b9902bd59fd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x939D 5188 bytes
font_01_sfnt_off0000a526.bin
f51186d7730949e7c30893f54ad6b4b9b1936c120cf2d606a6b7894419803b8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA526 10668 bytes
font_02_sfnt_off0000c9ca.bin
7f8c2667ab40a31f02ba8d0622a5ade89c603cbc082198797e165b1739d0560f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CA 16864 bytes