Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f3b5557b374ae3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 22:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 924c0b8a99529c88f3498b57bbc0f5e4 SHA-1: be6eb0441903b020f0e717aab630ca8093f99c84 SHA-256: 26f3b5557b374ae376aca4f5e1aba801918bc8ff2496463e5b584d35cf6d8843
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=custom+rom+lenovo+a6000+kitkat'. Additionally, it exhibits a PDF link farm pattern with 17 external PDF links, many hosted on cdn.shopify.com. The document body also contains a call-to-action phrase, suggesting a lure to click on these links. The primary intent appears to be redirecting the user to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=custom+rom+lenovo+a6000+kitkat
    • http://vorelo.pyralag.com/uploads/1/3/0/7/130775164/pogewokaj_zorosevi_mesegisedawozeg.pdf
    • http://files.renewyourminddaily.com/uploads/1/3/1/0/131070356/214cc6c316521ff.pdf
    • http://files.fairviewparkrec.com/uploads/1/3/1/4/131437139/efd4d909a13.pdf
    • http://files.zikhafrimainecoon.com/uploads/1/3/1/6/131607930/bafobosutevil_disetirex_lamasatimababed.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/xinisazitujegas.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/96123319082.pdf
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/minecraft_mipmap_levels.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/82984291772.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/wegafutubovuzofigizemox.pdf
    • https://cdn.shopify.com/s/files/1/0439/3022/2747/files/design_technology_specification_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/lista_de_exercicios_arcadismo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/zoriwaroretovod.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/lulexenivej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/business_narrative_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/velisejumerawavidusi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/69083325108.pdf
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/9426839491.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_off00006589.bin
3325d7115f189d58f51c0b56cc6a18084d0ce558def51c4e3ab9ced05616926a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 5156 bytes
font_01_sfnt_off000076fe.bin
a453a62757b078b0df4e323b54e67cfafdbbaab27188e4d1987be98fc7f4ca7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FE 10436 bytes