Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd753a642b387a1…

MALICIOUS

PDF

47.4 KB Created: 2020-08-25 08:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 860e62d0ef094ebc5318160a7f71392d SHA-1: c960d50f2a1890229933c30613818dcab1821146 SHA-256: 1dd753a642b387a1b09076327fb539920d62d786fb9f439dfa5aa53e14ce55ab
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The presence of a 'download button' heuristic further supports the attack pattern of tricking users into clicking malicious links. The file also contains a large number of embedded links, many pointing to Shopify, which is likely part of a link farm to improve SEO for the malicious redirector.

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=bangladesh+ansar+vdp+admit+card
    • http://files.pioneervalleykennelclub.com/uploads/1/3/1/4/131407102/6969cd.pdf
    • http://files.trbtoolsofthetrade.org/uploads/1/3/1/4/131406258/695242bf8587.pdf
    • http://lutetefe.bexbourne.co.uk/uploads/1/3/2/7/132712237/f1bde4233dda491.pdf
    • http://files.spokanehomeprep.com/uploads/1/3/2/7/132711999/kiduwexiwaxi.pdf
    • https://cdn.shopify.com/s/files/1/0464/2403/1384/files/compellent_fs8600_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0465/0709/8262/files/tukijenotov.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/67728886739.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/natufivegadojav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/34727945748.pdf
    • https://cdn.shopify.com/s/files/1/0466/7247/8373/files/apache_poi_word_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/list_of_antipsychotics.pdf
    • https://cdn.shopify.com/s/files/1/0458/2860/4067/files/chess_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6284/files/68428074255.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/bezunut.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_off0000622f.bin
155b33a164d0de3bb4547ce72d5b165feeb64701c21221de9c9a852dce1ae7d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x622F 5596 bytes
font_01_sfnt_off0000750a.bin
c63a1e880322a8b057cb922487e6b739f1ca6c5e939b243c2da21cbe16851b84
pdf-font-stream PDF embedded font (sfnt) at offset 0x750A 7016 bytes
font_02_sfnt_off00008bdb.bin
d2d12f5cf79d2eee46a4e6690fc82a92453eb0eb94455d6897369925c5cb5ced
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDB 11072 bytes