Malicious PDF — malware analysis report

Static analysis result for SHA-256 def87e0b56f79cae…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 05:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c515bc4588b780d99bcfa78ff557cd5 SHA-1: a3ee30d7833a60dd29451aa62c3cdb710a0b3a23 SHA-256: def87e0b56f79cae6efceb9e465f3cbd96cf60159f91809d3042feb7f3a391dd
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=google+wifi+centurylink, which is likely used to redirect users to a phishing or malware-hosting site. The document body contains garbled text but includes the same malicious URL, suggesting it's part of the lure.

Heuristics 3

  • 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.
  • 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=google+wifi+centurylink
    • http://mixafuzum.curtainrepair.com/uploads/1/3/0/7/130775320/7348583.pdf
    • http://files.immortalinquiry.com/uploads/1/3/2/6/132681910/a1f81556885a0.pdf
    • http://files.savannahsclayspot.com/uploads/1/3/1/1/131164097/subuv_nomame_fejipitop_tubijakater.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7645/files/nezavivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1319/files/bedelemojixuruxopuledaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/74612001994.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/sogitasozarov.pdf
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/download_os_x_10._11._4.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/51229287536.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pemajufubakilufoxosidoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/gurexejib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/3919368520.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/45409942364.pdf
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/petufefe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/38781228092.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/64530585169.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_off000068a7.bin
8059e8be0c661318ffed3d3699acbcb3ce153c6a9a096a3f4cf0037dabcc1207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 4952 bytes
font_01_sfnt_off000079bb.bin
4aa0f7b6b49e6eecfb6ea16e0677a1eb7f47a539b9d3acf97ef9c7b373b21262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 10860 bytes

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