Malicious PDF — malware analysis report

Static analysis result for SHA-256 3633af1eab263b23…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 10:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f849f8c95d0993800d721f708454c51 SHA-1: 7e16cf3f429621d725e0f797565d01c375869ab2 SHA-256: 3633af1eab263b23e8578e55b81e319f39495d99f8e2636f379ce0d4d293e340
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a helpful document. The document body itself is heavily obfuscated but contains the same lure text and the malicious URL. The PDF also contains a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse. 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.cc/pify?keyword=how+to+insert+header+in+excel+spreadsheet
    • http://nemalinos.francisweller.net/uploads/1/3/1/4/131454526/jenoj_gozifexisomo_samusol_vimaxarufes.pdf
    • http://bekekoja.reedleyhslibrary.com/uploads/1/3/0/7/130775997/wejuxideka.pdf
    • http://files.danaechohawk.com/uploads/1/3/1/0/131070827/b565e4438b90.pdf
    • http://files.thebestinmusic.com/uploads/1/3/2/6/132695915/vufirav_bowoxupexifi_xuxapevata.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/75809014549.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/wifagarujugutuvijatufipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/kupipopozojegakutani.pdf
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/algebraic_topology_a_first_course.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/wilovorexiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/invertebrate_zoology.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/pamuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/16787835929.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/fimolopagij.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/3070878031.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/zonalutabovolegepuzogakuk.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_off000067c5.bin
37ee1b1075ef0598e93ad2b5fd7924cfb6c4cc80d75d64387a19faa7532b8e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 5284 bytes
font_01_sfnt_off000079c0.bin
db4e0161ae1c12fc29e73e090745a277737a8f88123aecf65e6cb6b95e766170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 9908 bytes

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