Malicious PDF — malware analysis report

Static analysis result for SHA-256 301523c71ceb2524…

MALICIOUS

PDF

50.4 KB Created: 2020-08-14 02:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a83a06ca520dc149034d589cbd5bc75d SHA-1: 02ccd6a69fc0f3e95e7581c5e0bed1a91254f244 SHA-256: 301523c71ceb2524c7cf4d33f653cac69fca4ebbb743f998b023bb5f8ad7211d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body text, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to trick users into clicking malicious links under the guise of providing academic resources.

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/wb?keyword=ugc%20net%20history%20previous%20question%20papers%20pdf
    • http://wadaligig.kymosquitocontrol.com/uploads/1/3/1/3/131383483/707806.pdf
    • http://files.nutritionworksri.com/uploads/1/3/1/3/131380547/zuvonokomu.pdf
    • http://files.nhinayasss.com/uploads/1/3/1/4/131483685/559d28956.pdf
    • http://files.visionsworkshops.net/uploads/1/3/1/4/131453855/c515dd3407f9.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8827/files/16931532726.pdf
    • https://cdn.shopify.com/s/files/1/0437/8515/8807/files/invertebrate_zoology_barnes.pdf
    • https://cdn.shopify.com/s/files/1/0448/0407/9777/files/sprawlopolis_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/petsafe_wireless_collar_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/gunurotuzuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/65252753911.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/possessive_nouns_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0440/2275/9582/files/3251248291.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/44695664228.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/kafatokokekebefodenime.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/46343622988.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/ley_de_amnista_mexico.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_off00006e99.bin
3d89e4b60e8fab324dea0474f8cde61d4f86c65c70134fcf3c09dd07e70db920
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E99 5664 bytes
font_01_sfnt_off000081dd.bin
41c5d1751fd1f04c082812de2a0a4f18aa4835080dd016113629ba3f8532658d
pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 10852 bytes
font_02_sfnt_off0000a6f7.bin
0d7a92828fb34c46272def7401d297891c72c028a4bdfa4d2814ce18bde6b281
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F7 16164 bytes