Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8457e05bbbb5f1…

MALICIOUS

PDF

51.3 KB Created: 2020-08-12 17:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74c097b5ada3fb5da2bfea0f54b2588a SHA-1: e94b25a42e75d16f3711279fb896a48cd71adbc0 SHA-256: 1a8457e05bbbb5f124491e97ea0ddf93f4a466fd5dcaff581d433dc773ac9324
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with at least one pointing to a known malicious redirector at 'https://ttraff.ru/wb?keyword=taquicardia%20sinusal%20causas%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of multiple Shopify links, while some are benign, contributes to a link farm strategy to obscure the malicious destination. 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/wb?keyword=taquicardia%20sinusal%20causas%20pdf
    • http://files.thebasslaboratory.com/uploads/1/3/0/8/130873783/jajejuwonujivat-vapabavofo-buwoselumik-falafuzige.pdf
    • http://files.ajlegalaustralia.com/uploads/1/3/0/7/130740504/dapiritususuf.pdf
    • http://files.papercranesoaps.com/uploads/1/3/0/7/130776828/radiwixufuxaw-sizijezevun-zotomizivax.pdf
    • http://nurerul.jeffresnick.com/uploads/1/3/0/7/130776445/vetixo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/convert_to_vertex_form_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4581/files/bullish_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/21316860253.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5718/files/gipisotodivefo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/62371860771.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/13723977060.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/principles_of_helicopter_aerodynamics_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/92203911725.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/real_time_applications_of_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/vijatelatotiralotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/mamojevu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6716/files/audyt_finansowy_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/torobuwepoboxowetilopewo.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_off000089cd.bin
52bb0c3fe63b84d1686e3fb739527e20ca288af1cd8fb51d8b6c3b9739ab2f23
pdf-font-stream PDF embedded font (sfnt) at offset 0x89CD 5224 bytes
font_01_sfnt_off00009b99.bin
4a54c3412b4f4307ab6addbeb9bd6b8cca328be623b0bb5a2330b454b4961189
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B99 10688 bytes