Malicious PDF — malware analysis report

Static analysis result for SHA-256 5220ba4d491ab061…

MALICIOUS

PDF

60.4 KB Created: 2020-08-14 05:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a378f35a090965b80835c9554ae0832e SHA-1: 74af3f8c86ca5426a081d2173c1d3dc7f8f50b37 SHA-256: 5220ba4d491ab061ec9ced1955c57af0f64abfc9b871af204bc1fb8ae2301e6f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the document's primary purpose is to redirect users to malicious content.

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.ru/pify?keyword=numeros+romanos+ejercicios+primaria+pdf
    • http://files.ccpwildlifecontrol.com/uploads/1/3/0/7/130739263/fuwomuvojafisosifowe.pdf
    • http://files.alphagolfopen.org/uploads/1/3/0/7/130775701/158390.pdf
    • http://files.theunquarantinedmind.com/uploads/1/3/0/7/130740530/3794916.pdf
    • http://files.timothyodzer.com/uploads/1/3/1/8/131871864/68812fdf.pdf
    • http://files.sillyhatsundays.com/uploads/1/3/1/3/131380337/zapumonijoketaf-lawexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/kaxudalimokedalazozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/befakajiwugibinorixero.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/62354269402.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/75666223511.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/vugufugunemid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/97627058534.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/ffv_best_job_combinations.pdf
    • https://cdn.shopify.com/s/files/1/0434/7448/5401/files/como_converter_para_dwg_no_autocad.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/kopexajedinutifanekolibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5724/0478/files/zikofomazupovosanogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/52927403797.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/bacteriological_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43692268827.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008051.bin
8db0477bcdeec73c981c35d0baade2042ad864a8984c068e1e069cfd4ffcc3df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8051 5116 bytes
font_01_sfnt_off0000919f.bin
1052e7eb1606b16f8a8bd9b937c6873703310b21522a1e5801765b110292b0cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x919F 14628 bytes
font_02_sfnt_off0000bea7.bin
0b9a470a83749802badcbd7d1d0fbcf06e3a9522711bbcc605b37bb17f1ff554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA7 16164 bytes
font_03_sfnt_off0000d3c6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C6 4324 bytes

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