Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a9b7d07f05b321…

MALICIOUS

PDF

46.2 KB Created: 2020-08-14 13:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1cf3bfec1918b6c5b98d0ca89e76270 SHA-1: a36ca76b751de82c258ff03304e89c337f82f726 SHA-256: 35a9b7d07f05b321d0f00c0854523102215376db49c8c83f45f27277c483940f
128 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a PDF redirector link pointing to ttraff.com and a PDF link farm. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of a 'download button' lure further supports the malicious nature of the document, which aims to redirect users to malicious infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=audiobook+maker+free
    • http://ketive.gwcservices.org/uploads/1/3/1/1/131164312/c81a55be650fa4.pdf
    • http://xumixufi.e-badmintonclub.com/uploads/1/3/2/6/132695615/29c2822134b.pdf
    • http://files.wildtimes.co.uk/uploads/1/3/0/7/130775950/sifukajebuk.pdf
    • http://gopele.thevegandinosaur.com/uploads/1/3/1/4/131407655/3954831.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/41880335771.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/jumakevifejugotod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/jomarezojosubawa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/c_al_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1207/files/ff14_leatherworking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/36187058145.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/pojozimeserum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3245/3030/files/google_wifi_ddns.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/somerurunem.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/magellan_global_fund_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/48469854963.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/chemistry_chapter_2_measurements_and_calculations.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_off000068f0.bin
d3dcf171c30d25d6251ab94cb0decca4809d8dd08c16ff41099891585d7e40e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F0 4732 bytes
font_01_sfnt_off000078fc.bin
4976f07f8a26fc2c39981fbf93d561092cb08168b884e17d714ac6474e1bd6ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FC 10684 bytes
font_02_sfnt_off00009d92.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D92 4324 bytes