Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4172320bb4b66d…

MALICIOUS

PDF

48.5 KB Created: 2020-09-18 08:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ded02a624f1e06c23719e98198f886f SHA-1: 6de813941cc84102497367d27446d8e447169a14 SHA-256: aa4172320bb4b66d4acbe453c0019529fff8ef167663f1bd647df356ae7c6608
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'worksheet answers world history' and the malicious URL itself, suggesting a lure. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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=who+am+i+worksheet+answers+world+history
    • https://cdn.shopify.com/s/files/1/0439/3759/5560/files/download_simple_prayer_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/4382/9398/files/neural_camera_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/oasis_episode_2_release_date.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7561/files/gasulevozeputisupiw.pdf
    • https://fa3edac8-aad3-4df5-84c6-a48505743e61.filesusr.com/ugd/1479de_703c01998a2a40cfa40f6e14ab559000.pdf?index=true
    • https://82f720f3-4de7-4549-aec2-01adab16636e.filesusr.com/ugd/455f95_ed6254b86e904d9fb4e95aeacf270bd4.pdf?index=true
    • https://944a3776-319b-435c-819a-64260d6663c5.filesusr.com/ugd/21a131_dc203799dc9446b5979bdd24c3e56e5a.pdf?index=true
    • https://e8b5a179-3cd2-47da-9cf3-e812711d9f91.filesusr.com/ugd/2c76f4_a0a41fe3f0a34072ae1d1d7b4778534c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/53202450219.pdf
    • https://cdn.shopify.com/s/files/1/0436/3413/1104/files/mercedes_e240_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1985/files/tezozusafetixarejinakaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/zetud.pdf
    • https://96a73778-c59e-45a1-86f6-58d513b3964d.filesusr.com/ugd/1e4819_71e6d6a828944c4fbcfeb29a0f9e9547.pdf?index=true
    • https://e82ffc84-9ae8-4b01-809a-3df7b790ba8b.filesusr.com/ugd/05900a_8dc04a42ded249fe8f0122025194171a.pdf?index=true
    • https://2d827acc-73cf-4c04-94f8-8f1278ae39f0.filesusr.com/ugd/f34823_f7b09990647e49d6be00da02c36c0fab.pdf?index=true
    • 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/
    • https://944a3776-319b-435c-819a-64260d6663c5.filesusr.com/ugd/21a131_dc203799dc9446b5979bdd24c3e56e5a

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000099cb.bin
eb59ae8b460097c14201d0d4ce862a0be277ac04e1b4790ee3dd590006a27384
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x99CB 17676 bytes
font_00_sfnt_off0000646f.bin
a8b734d357b307adb92c5cfbe6416275e03db12a1c006c54704e92aff16e2318
pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 5336 bytes
font_01_sfnt_off00007680.bin
8b5cc462f99a3027de66754ac9cb9f3f469a214b70baca0e74a8ee3a8eaf02c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7680 10332 bytes