Malicious PDF — malware analysis report

Static analysis result for SHA-256 86505e4e42e123d3…

MALICIOUS

PDF

49.2 KB Created: 2020-09-04 19:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c124c5ea4aac1ab7eed34cf7f5bbe51 SHA-1: d16fb098155d9e520e40d5d1f3aa876e87f2661a SHA-256: 86505e4e42e123d3775d5918d6ef5e82adbc0fbd919de50b4a5c97d82de56358
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=poe+betrayal+crafting+guide'. This URL is presented within the document body, disguised as a crafting guide, to entice users to click. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on static.usrfiles.com. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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.me/wix?keyword=poe+betrayal+crafting+guide
    • https://static.usrfiles.com/ugd/575363_5cb3d7d580bb4365a332c48e2ba30adb.pdf
    • https://static.usrfiles.com/ugd/4cf28d_606bbdec735543819c74c04ac44aeda9.pdf
    • https://static.usrfiles.com/ugd/9aab09_81ff684974814259ba44db51ad59afb9.pdf
    • https://static.usrfiles.com/ugd/de65f7_0df2c4d9e7584588b7317a0a81e16725.pdf
    • https://static.usrfiles.com/ugd/1b8612_2482da95a99041399871a194dc64cff5.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/zipakutajowax.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/58491864796.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/pokemon_egg_groups.pdf
    • https://cdn.shopify.com/s/files/1/0438/6239/2992/files/doraemon_story_of_seasons_guide_fishing.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_eb706c1c0ba94b7c8836a3a671795a54.pdf
    • https://static.usrfiles.com/ugd/10a4aa_064ff5b418cc4c649da50094765b982e.pdf
    • https://static.usrfiles.com/ugd/27135d_be5526cca7914fc685e029bc8c98260f.pdf
    • https://static.usrfiles.com/ugd/73c254_af50d6bf4ccf4daa9484d8fbcdc156e4.pdf
    • https://static.usrfiles.com/ugd/79e5df_4b52d636a8d64f7b824cdb4666407125.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fcc576ca8564adf9185efd0e838529a.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_off0000825f.bin
689df08b1fcd5c2aa06635c53766f6d21aeb0588b0cbc9b9d6e27fa33214c9c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825F 5252 bytes
font_01_sfnt_off00009452.bin
011b42afc8e2c6d045db8c0b6eaa4f65f3e641ae53e2e6f5f443a1a7c1a442f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9452 10420 bytes

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