Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2524d51a458c80b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-06 14:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 850e665a0b10b91e173e7770584ae6c4 SHA-1: 3527eaec590106b2c5dafc3e4e6fb10f2e3917ab SHA-256: e2524d51a458c80bb0fbc93f763e044bebbb6bccd615996ebae793d67bf13999
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary distribution point. The document body, though partially corrupted, contains text related to 'Curvadora de tubos hidraulica manual' and the wkhtmltopdf application, suggesting a lure to disguise the malicious links as product information.

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.com/wb?keyword=curvadora%20de%20tubos%20hidraulica%20manual
    • http://files.virtualbudo.com/uploads/1/3/1/0/131069886/7042179.pdf
    • http://files.calibrebeer.com/uploads/1/3/0/8/130813701/korazemisezajo.pdf
    • http://files.13ththeatreco.co.uk/uploads/1/3/2/6/132681647/zaxenafatesev.pdf
    • http://files.gallery.allie-coosh.com/uploads/1/3/0/7/130776257/misifugobabuxofekow.pdf
    • http://files.funnyfarmanimalsanctuary.org/uploads/1/3/0/9/130969873/vugorozuzomalomowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/deberopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/python_argparse_list.pdf
    • https://cdn.shopify.com/s/files/1/0448/5667/2418/files/convex_hull_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/94874367299.pdf
    • https://cdn.shopify.com/s/files/1/0433/6441/7695/files/boyds_bears_values_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/mazak_nexus_510c_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/9696/9121/files/pdf_minimizer_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/acupuntura_auricular_china.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/49660421595.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/79239642854.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/63601100700.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_off00006137.bin
624896b3c1a86483a18a05a264eb1344909769409d0e354a042f869840ebf77b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6137 5284 bytes
font_01_sfnt_off00007303.bin
380fe069d22e027ac31008f740f6c858d0b46e4d83efb328431ca80ddf8df708
pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 11616 bytes