Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6697816a134cba…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 03:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa15d735f7bdeb5aa6fc126a06b07741 SHA-1: cf6ab3fc499ae45dd0d29bc792f6c578ab2886a6 SHA-256: de6697816a134cba071a019415dc2adc5002ad829e12ebb24fc0660f8613afd3
128 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding a large number of external links, many of which point to potentially malicious or unknown domains. One URL, 'https://ttraff.ru/pify?keyword=shape+tracing+worksheets+free+printable', is flagged as a known malicious redirector. The document body, though partially corrupted, contains keywords related to 'shape tracing worksheets' and includes this malicious URL, suggesting a lure to drive traffic to malicious infrastructure. The presence of a "download button" heuristic further supports the idea of a deceptive workflow.

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.ru/pify?keyword=shape+tracing+worksheets+free+printable
    • http://vitofev.octopusgardendivecharters.com/uploads/1/3/1/0/131070374/nubabikeveb.pdf
    • http://files.eroticabotanica.com/uploads/1/3/0/7/130739758/nemozizaxezek.pdf
    • http://files.christopherwrench.com/uploads/1/3/1/4/131437669/4512208.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/zanuzijavamurogelakiriwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakawefefaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/duduburilenaxagunojuk.pdf
    • https://cdn.shopify.com/s/files/1/0447/2084/9050/files/rerer.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/clep_college_mathematics_examination_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/723092504.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/24542927532.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/john_deere_diagnostic_codes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/72551391171.pdf
    • https://cdn.shopify.com/s/files/1/0437/1709/9675/files/71583621727.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/jisajeferuji.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_off00005ca0.bin
89a132d49799a39b4c305b979af414dce02e75a73c347e8cc8d37855356092b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 5676 bytes
font_01_sfnt_off00006ff7.bin
be6383360333fa132a4b140a1f156e3c7e5f542f5b71505c2c17453e89cedbff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF7 11648 bytes