Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d668d7d76d2753a…

MALICIOUS

PDF

54.5 KB Created: 2020-08-09 03:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fefffadaf9de913c1f7b2c09c6ec2621 SHA-1: 3c5d51f7bb3e34c5aa5e5567225cb13d854660a5 SHA-256: 8d668d7d76d2753a7e1d7fbb0f24e99000e2ad4516299964950c4c8a61723a9e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=adobe+premiere+pro+cc+tutorial+pdf+indonesia'. This URL is used in conjunction with a large number of embedded links, many hosted on Shopify, suggesting a link farm designed to obscure the ultimate destination. The document body, though heavily corrupted, contains references to 'Adobe premiere pro cc tutorial pdf indonesia' and the tool 'wkhtmltopdf', indicating a lure to disguise malicious content as a tutorial. No scripts were extracted from this sample.

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=adobe+premiere+pro+cc+tutorial+pdf+indonesia
    • http://files.michaelmoorestudios.com/uploads/1/3/0/9/130969461/napipiruluwuda-pigoper-xinunu-debupisogili.pdf
    • http://files.salentoby5.com/uploads/1/3/2/6/132681352/bivonumajorikug_kejimetazoligis.pdf
    • http://files.olenaluggassi.com/uploads/1/3/2/6/132681910/penurowozit-mudofita.pdf
    • http://files.leahteachesalexander.com/uploads/1/3/1/4/131406606/kuraxolu.pdf
    • http://nuvow.jackhostrawser.com/uploads/1/3/1/4/131483281/vataramaroruk-nasakowu-jubilavesanupot-papozafitod.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/stop_drop_dmx.pdf
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/zikoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/95880393210.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/vuvazimokegimawes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2023/files/41797472370.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/27455295258.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/92634508911.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/92282134533.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/44206586735.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4235/files/descriptive_writing_prompts_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/spirit_airlines_flight_attendant.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ab.bin
3bfcd5a4784ae59f6ec8acefea5f4b70a768746cb5704eb812ed02403a0c26a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AB 5312 bytes
font_01_sfnt_off00007b8b.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8B 1800 bytes
font_02_sfnt_off00008418.bin
c28ffdb19f33d45d55fa848091205ce1c5c662f51b23a0fc01a3c2948b2b7c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 10684 bytes
font_03_sfnt_off0000a836.bin
bc7e3f6831be34686de02ce7be2a06b9f1fa2b1a298201cd6e3dc3baf4672bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA836 16376 bytes
font_04_sfnt_off0000bddd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDD 4324 bytes

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