Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27826698cc7d76e…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 05:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e3e983aa2a038a864588de8ea5479e SHA-1: e29e4329346c6ae9f8da068ecc61dc397b591e0d SHA-256: e27826698cc7d76eae07fe1c48623d42e48f0d28dba4ac34251ef97b0bacdc55
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links, ultimately leading to the malicious redirector.

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=triangulated+irregular+network+pdf
    • http://bobedew.solonoidstudio.com/uploads/1/3/1/1/131164239/3035676.pdf
    • http://files.colearninglab.org/uploads/1/3/2/6/132682048/josubekuvujujapasoji.pdf
    • http://files.gowoonlee.com/uploads/1/3/1/3/131382320/vinasakaj.pdf
    • https://cdn.shopify.com/s/files/1/0447/8749/9157/files/nomenclature_of_aldehydes_and_ketones.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/10704768176.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/basic_guitar_chords_chart_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/sipirerizoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/boy_scout_cooking_merit_badge.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/65107766539.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/28815912417.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/ftce_math_5-_9_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/lelomesut.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/famujofaviwaxif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/gw2_cooking_500.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/descargar_resucito_cantos_del_camino_neocatecumenal.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/17006039491.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_off000065c6.bin
ac86c117873a2d597b619ffe3faca1900aa3f27712153a6cc1c961c7fc0b294f
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C6 5020 bytes
font_01_sfnt_off000076f5.bin
6d737a381e90fc4cbb1e1b222e0d951ad927bb5b8cdade147597f221f4261428
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 10228 bytes
font_02_sfnt_off000099f3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x99F3 4324 bytes