Malicious PDF — malware analysis report

Static analysis result for SHA-256 49734ca4b734f32e…

MALICIOUS

PDF

52.4 KB Created: 2020-08-10 10:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db944909e62ba6539b11ccfef159d4f SHA-1: de270401d65cf452ee6ec54c7b37ac636bfec243 SHA-256: 49734ca4b734f32e52d43d3ff462ec905f7bd88c16d1584b7907f0530db1f994
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=story+for+kids+pdf'. This indicates a social engineering attempt to lure users to malicious infrastructure under the guise of a children's story PDF. The file also contains a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. 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=story+for+kids+pdf
    • http://files.littletree-orchards.com/uploads/1/3/1/6/131637814/6a2fdeb9a.pdf
    • http://files.redroostergrill.com/uploads/1/3/1/4/131406762/59e6a4578591d.pdf
    • http://files.km4kate.com/uploads/1/3/0/7/130775856/nunupewakabirelam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/miguxulenasisomifoxanigen.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/adobe_creative_cloud_cleaner.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/67160074296.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/debuvamu.pdf
    • https://cdn.shopify.com/s/files/1/0450/6189/8390/files/leaflet_jantung_koroner.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/22292896758.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/buzukemupopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/remetotodina.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/99363884366.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/siwuvotibokukaliwila.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/31107824328.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_off00008677.bin
19333a510b1ecc753213f41e8e80e0aaf26ffdc4c72b9f812392c29e480144ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8677 5060 bytes
font_01_sfnt_off000097c7.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C7 1800 bytes
font_02_sfnt_off0000a055.bin
0820fe0e8c38c54e57d5ae610b5902e3777c6456d67740ff159d46b633dfcee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA055 10444 bytes

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