Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc16153b8645ccf…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 05:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2328458490a30fbeb30138bb8066d7ac SHA-1: 4db20f0159dba1901c991e401f42566a2c8c9dc9 SHA-256: dbc16153b8645ccf3a20d6d5c0c143381400f9551d70429b95452dc97c5fa986
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=oxford+english+tamil+dictionary+free++pdf, which likely leads to a phishing or malware distribution site. Another heuristic indicates a link farm, suggesting an attempt to artificially boost SEO for malicious content. The presence of a 'Download' lure further supports a malicious intent.

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=oxford+english+tamil+dictionary+free++pdf
    • http://files.triadmanagementrealty.com/uploads/1/3/2/6/132682790/somejuwamajotidemox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/duxegusisasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5427/5479/files/zanesawosasusujurum.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/31874305842.pdf
    • https://cdn.shopify.com/s/files/1/0429/9256/6435/files/7_maker.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/nakof.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/behavioural_approach_to_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/1781/3661/files/1379384110.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6659/files/70694954919.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/48217297400.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_off00005746.bin
b5c543044344b11617f68ca506fc4314448aab45a48d5f2ddc158523678f471a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5746 5764 bytes
font_01_sfnt_off00006aca.bin
792061ad8e685eb0f268b0721b122489dab74073575fb7ecbe99cb4ebd30bce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 14408 bytes

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