Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6cd7c8012668ba…

MALICIOUS

PDF

47.2 KB Created: 2020-08-10 12:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c0fc6ef5f779a1889ce12299fd7027c SHA-1: 0aa5e22115a4cfcc091e92ee6c6e3f5241a1df8a SHA-256: 1d6cd7c8012668ba5973413d3ec4a6369732a7770ba7f12ab1e231a4daeffd11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'cctv installation training pdf' and the malicious URL itself. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a harmful site, likely for credential harvesting or further malware delivery.

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/pify?keyword=cctv+installation+training+pdf
    • http://fusuxapu.1sthkcsg.org/uploads/1/3/0/8/130813528/66f164f6be784.pdf
    • http://files.thescea.org/uploads/1/3/0/7/130740072/6018821.pdf
    • http://files.greencitycoalition.org/uploads/1/3/1/8/131871518/vosevof.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/38993982512.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/radidujibetivukixatipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/fobijelusijilinowav.pdf
    • https://cdn.shopify.com/s/files/1/0443/2723/9836/files/ordinal_numbers_worksheet_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/76739852260.pdf
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/lifehouse_you_and_me.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/xiludutetu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/55917801201.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6823/files/mukumiboresalosex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/50992355309.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/vopanefobizidubobo.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_off00007a9e.bin
8d53055ee3901c1196e85429d40b05a89d05bd427557ba091fcac0b4987fc461
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 5288 bytes
font_01_sfnt_off00008cb0.bin
dcd93ac1dc63edb72937dd57dd01b9ce4d4f3f5e19cf0f2922cfee479fce05c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 10316 bytes