Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bd243b0f3d7b73…

MALICIOUS

PDF

43.0 KB Created: 2020-09-16 17:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01210ce8fff1a2773321674833baa63c SHA-1: 433f7b22dfd4dbde5367d4f2946b54974dde2908 SHA-256: a7bd243b0f3d7b73bd16356751128bdd64d5abd300718d89b5cd6301d28360b8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=olympus+omd+10+manual+focus', is designed to lure users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves social engineering through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=olympus+omd+10+manual+focus
    • http://wibowule.cpccedu271.org/uploads/1/3/0/9/130968973/sajekonuvutinitod.pdf
    • http://files.onedollarapologist.net/uploads/1/3/1/1/131164009/806339.pdf
    • http://files.foodandbars.com/uploads/1/3/2/8/132814989/dajelogitotun.pdf
    • http://direbaka.ysk-chb.com/uploads/1/3/1/4/131406676/tamazemowesojimidal.pdf
    • http://files.riefcanada.com/uploads/1/3/1/4/131437158/d34ecfeb49.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/creative_writing_a_workbook_with_readings.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/56049363436.pdf
    • https://cdn.shopify.com/s/files/1/0463/0691/8557/files/collision_analysis_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0466/5842/0901/files/88679003348.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/54404369830.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/pezuxige.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1289/files/38248772101.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/tekeji.pdf
    • https://290d28b3-a959-4170-b80e-5ffe959b65a2.filesusr.com/ugd/735189_12094d41bf054669a7b7a18c7b6b9ed8.pdf?index=true
    • https://e496b25e-61dc-4fdb-adad-da07a25c46de.filesusr.com/ugd/3be48b_87815ca91df6480d9280ea9c3ae2524c.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005406.bin
7243ccbf248e2694f0c4c0dfaf791a18b9d260f20d9c7b74fd0d2658440c6157
pdf-font-stream PDF embedded font (sfnt) at offset 0x5406 5528 bytes
font_01_sfnt_off000066d0.bin
0bf941537aced94596e61efbf759936a7fdd7af6bbe3edb18d8e4c9e8ef9834a
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 10036 bytes
font_02_sfnt_off0000896e.bin
4c546d31c579de887a25148404dfd84a1d3ee202a243da1a388503521d3f565a
pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 16336 bytes