Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec57b46a07fdf4c3…

MALICIOUS

PDF

145.5 KB Created: 2020-08-21 03:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7ae7091182eb22ffd081f15ba31f35 SHA-1: b7180084acd2ad6b5ff84abe5ad53aba10d979a3 SHA-256: ec57b46a07fdf4c3b66f0f48b5f128c2bb3a61438e265a80158eb871119c6b18
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, indicating a potential SEO poisoning or traffic generation scheme.

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.com/pify?keyword=aerofarms+annual+report
    • http://files.secretspartanburg.com/uploads/1/3/1/1/131164419/busaretasepajud.pdf
    • http://files.savefarthingworthgreen.org/uploads/1/3/2/6/132681194/dc5d99981.pdf
    • http://kokir.natesessentialtraining.com/uploads/1/3/1/4/131407736/320178.pdf
    • http://vaninosu.amarilysfictionediting.com/uploads/1/3/1/8/131871921/c6076b3613f35bf.pdf
    • http://files.puldinauto.com/uploads/1/3/0/7/130775171/depimob-kuxenafobix.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/simple_present_tense_reading_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/19762399169.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/61299728543.pdf
    • https://cdn.shopify.com/s/files/1/0430/0531/3177/files/43166277322.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/jazujusivuriwupadizilute.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8950/files/42383970776.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/candy_convert_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/51048399094.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6849/files/razaboguwel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/wosevidajasopumewuzosovex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1905/0908/files/tanipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1942/files/69383844069.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dd32.bin
ff863ed8791439e91dd30d39ba313abd7d4aa77d868483d632e4ac4cca05219a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD32 4868 bytes
font_01_sfnt_off0001ed9e.bin
e76648f5e3f1c46874085fa28e6ee76798415b955a1d954f469c9c4a7b0c581c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED9E 11364 bytes
font_02_sfnt_off00021477.bin
1d4d671ae502080d93142a7eeda7a219ae6747fc4e119e8b75dad7192e420eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21477 16208 bytes
font_03_sfnt_off000229a3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x229A3 4324 bytes

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