Malicious PDF — malware analysis report

Static analysis result for SHA-256 4351871a380f385e…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 20:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5741bb48b571430be4366c26f8bd6a03 SHA-1: 427d73df35de3a6527213012dd1f969ada606726 SHA-256: 4351871a380f385ec5148ea3b8dd70ed3cd59719ac4447cbf77111b54449c814
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.ru', which is likely intended to lead the user to a malicious payload. The document body, though heavily obfuscated, contains the title 'Angle properties of polygons worksheet pdf', suggesting a lure to disguise the malicious intent. 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=angle+properties+of+polygons+worksheet+pdf
    • http://keloru.cafezippy.com/uploads/1/3/1/8/131871486/133eba2.pdf
    • http://files.patagoniafallfestival.org/uploads/1/3/0/9/130968933/zonenivasufonal_rolijavafu_sezefasuronu_nimonufoluxup.pdf
    • http://files.laptopupcycle.org/uploads/1/3/1/4/131409442/6c42a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/46840234396.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4647/files/86201522109.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/48124596864.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/limewirw_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/56079414311.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/31346772369.pdf
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/ethnicit_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/37349854221.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/digital_electronics_full_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/gigegamomixepawiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/berserk_volume_12.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_off00006021.bin
9d01db9dbdda8e2916fdff78f0cda341508cb2b9895854036bd88f884e84837b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 5340 bytes
font_01_sfnt_off0000725a.bin
a8b3c831976f7dbd57c505a4ba3bd61c7fb34246f630661d99fd1a4c3f905efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 10096 bytes
font_02_sfnt_off000094bd.bin
2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 16120 bytes

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