Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c38e100d3b8a35…

MALICIOUS

PDF

41.3 KB Created: 2020-08-10 10:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e0bf7a74f65f0fa236d0abce0e32251 SHA-1: 66e2c1e25d23e6f6a4aaf34718aa1c6fcb332ea7 SHA-256: f6c38e100d3b8a355d294c9504982fd28c329cfd21d6f2e4f044e5badbf90353
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised with a keyword related to Cambridge exams. It also exhibits characteristics of a link farm, hosting numerous PDFs on Shopify domains, suggesting a broad distribution effort. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=cambridge+exams+2020+pdf
    • http://files.sisterearthclayworks.com/uploads/1/3/0/7/130776409/rizibuk-vinutejoged-negidunelo-bigejoju.pdf
    • http://xugulemip.jacklechon.com/uploads/1/3/1/3/131380845/4415253.pdf
    • http://files.brooklandplace.com/uploads/1/3/0/7/130740138/gujidibavutivuxinugu.pdf
    • http://files.shopmylittleparty.ca/uploads/1/3/1/3/131398139/684c1be2103.pdf
    • http://fiwafot.anroflowers.co.za/uploads/1/3/0/8/130814328/sivememasarupaxekidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/mobile_ad_hoc_networks_in_mobile_computing.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/sikoxub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/58747777186.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/metal_alloys_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/figabamunavizuwaloxozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/kodijapez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/10840324976.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/sirunorezazefax.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/9196914484.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/15476910368.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/58578786341.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/pujimuwa.pdf
    • https://cdn.shopify.com/s/files/1/0450/0425/9492/files/equations_with_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.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_off00005376.bin
848da1e0b40dfcba6d9a9b5095cf8249f22a52372efdf702d9bd1ba62a213571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5376 5324 bytes
font_01_sfnt_off00006594.bin
6a1c84d8a27c6ddb52a13c67385c6773d047c0f5571e69eb28d5751d193cd09b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 10728 bytes
font_02_sfnt_off00008a02.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.