Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba67e879cf85f1a7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 13:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c348cfa5f12b06168a337e86d957d622 SHA-1: 446ac8a03d82c7bde91f8d125a4ff5ed60aa5d76 SHA-256: ba67e879cf85f1a77299c2fef1ff310dbcaf4d4bbd4115d9ef1e7489806aa600
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, indicative of a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/pify?keyword=asterix+en+italia+pdf+gratis+espa%25C3%25B1ol`. The document body, though partially corrupted, includes this URL and appears to be a lure for free PDF downloads. No scripts were extracted from this sample.

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.com/pify?keyword=asterix+en+italia+pdf+gratis+espa%25C3%25B1ol
    • http://files.undergroundcomedyfest.com/uploads/1/3/2/8/132814463/migerajulatin.pdf
    • http://kodovok.orlandoforfamilies.com/uploads/1/3/2/7/132740978/vuvesuwawewaw-fojutekadun.pdf
    • http://files.tingengroup.com/uploads/1/3/1/4/131437532/wederavinezara_vegagis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/zimumegupopaduri.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/gaxixuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/foderubukibunax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/42704223080.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/fikavedemonelafukubibap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/xinitevefawegizerumokitiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/48207830710.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/jeloseduduvekatapukisoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/57785738976.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7350/files/49339272161.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/dekoron_cable_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/28325452852.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/sidiboxer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/85139165097.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/49110982712.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_off0000651b.bin
71f95e4f610a0333fd3525de4a4129c625224ee13fb0ae63085033e20484c0df
pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 5480 bytes
font_01_sfnt_off00007798.bin
08c1090740e7727e368f6279cfac3cab94ee79ca9bf177153a7eb31ceb060659
pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 11260 bytes