Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd72391cc9c7501…

MALICIOUS

PDF

106.3 KB Created: 2020-08-06 07:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9243718a998578c7dbbaf1800a496aad SHA-1: 2d59a1f9cb0748375c8f44949f11a2a387cb5ba3 SHA-256: fcd72391cc9c750171bb9cbf0894f6dc0405c53392a61ffa112fa35ab8be75d4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to a calculus textbook solution manual, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to distribute malicious content or manipulate search engine results.

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.cc/pify?keyword=calculus+early+transcendentals+11th+edition+solution+manual+pdf
    • http://files.maggiemccabeart.com/uploads/1/3/1/4/131406739/gavakok.pdf
    • http://files.ultimatepalestine.com/uploads/1/3/1/4/131414240/2723728.pdf
    • http://files.werribeegymnastics.com.au/uploads/1/3/0/7/130738912/filikiziz.pdf
    • http://files.gmp777.net/uploads/1/3/1/4/131437584/sazubipe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1832/8991/files/tinar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/bapesebopulifofetigot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/zavotabufigedijam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/wajapivulitelojiravug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4426/5366/files/busaruf.pdf
    • https://cdn.shopify.com/s/files/1/0447/8684/3799/files/bank_clerk_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/99373804693.pdf
    • https://cdn.shopify.com/s/files/1/0435/9018/9215/files/avalanche_breakdown_in_zener_diode.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/antibiotics_list_with_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/dimunativ.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131a0.bin
7849f96cd26c39457511a4baeb5206e30add5e7a65822cbb7275894746b7c0a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x131A0 5452 bytes
font_01_sfnt_off00014407.bin
a5275284e823cf5e35a9d49e8fc4494c759771558d72947dcf825863c9c1f69e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14407 16152 bytes
font_02_sfnt_off000176e3.bin
caea212bfaaf2897f4851770f673d25c90b0e412378cb4b0d6f36fafa9739068
pdf-font-stream PDF embedded font (sfnt) at offset 0x176E3 16072 bytes
font_03_sfnt_off00018b81.bin
820851b731abc509e86fd424ecb961d9d709cc5bf8777c35c00b4009ecb0103c
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B81 6076 bytes