Malicious PDF — malware analysis report

Static analysis result for SHA-256 95aab2c2d86ee0da…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 02:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d0c08493bed2a7315584cd9def8f0e SHA-1: fe65283e0899fa275f33a5fae79d34fc3f12aef0 SHA-256: 95aab2c2d86ee0dae186320f755e4514918648e87c00afe6846e45fdda6d0730
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body contains text related to 'Android studio requisitos recomendados' alongside the malicious URL, indicating a lure to encourage clicks. 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=android+studio+requisitos+recomendados
    • http://doxud.essense.com/uploads/1/3/2/6/132681556/a5e03eec610ca.pdf
    • http://files.practicsusa.com/uploads/1/3/0/8/130814118/tumejugux_bupopebarebur_pukiladexolom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/95767473765.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/sekumolanabalonebeluf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6487/5418/files/lepakusukisuwagetoluj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/44242365370.pdf
    • https://cdn.shopify.com/s/files/1/0461/5054/9667/files/tuxakawijuzovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kurejala.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/losidakibuvelamaxasevumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/93814383780.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/delesise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/reading_comprehension_exercises_intermediate_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/2332/7644/files/capitalism_and_schizophrenia_anti-_oedipus.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_off00005d25.bin
18cc7f36ad4f9f924a960f561cf5489581f32bd250643f8c66f1f1a977048430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 5168 bytes
font_01_sfnt_off00006e92.bin
2c01a5745972a642d0b9b9adaf2b69394fc92c7b21875cc5b6eec58726263168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E92 10032 bytes

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