Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5b3abfbc606904…

MALICIOUS

PDF

57.9 KB Created: 2020-08-13 23:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdca3f1792f2a04f69d54bf3f16efd46 SHA-1: f6d5b2c5c904d628209e7aba279e569e8d6f9c82 SHA-256: 8e5b3abfbc60690488a0afd34e7f03ff38436c3111baf557b04ff85e46615c53
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link (ttraff.com) disguised as a download button, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'SE_DOWNLOAD_BUTTON' heuristics. The document also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious IOC is the ttraff.com redirector URL.

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.com/pify?keyword=beach+buggy+racing+2++now
    • http://files.naturesquilt.net/uploads/1/3/1/8/131856769/5202585.pdf
    • http://jekujuxu.jasontarman.com/uploads/1/3/0/7/130775934/lirerilawezago-gewirixi-rinavo-moduzirazutik.pdf
    • http://files.focusworksedc.com/uploads/1/3/0/9/130969546/zulizawawesawaf_gofed_surexezagamat_botewup.pdf
    • http://files.swisscompleteeyecare.com/uploads/1/3/1/4/131453068/ca3d9.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/77212112616.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/byzantine_icons.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/fefopetipubu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/how_to_install_git_on_linux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/95920082155.pdf
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/40416690576.pdf
    • https://cdn.shopify.com/s/files/1/0438/0547/4978/files/49586421730.pdf
    • https://cdn.shopify.com/s/files/1/0434/8028/5348/files/small_size_reader_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/gastronomia_minimalista.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/auxochrome_and_chromophore.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/14995865653.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0939/files/jspdf_autotable_codepen.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_off0000a3e7.bin
502a2da917c109d9b4cb0a19c89cf232bfc0543b2b3046b5a0768a02d3fbccb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E7 5364 bytes
font_01_sfnt_off0000b641.bin
34dd4fc52faf091edde6ac254941d8c3db5cdd71e2fe6a16519f96f24f46b845
pdf-font-stream PDF embedded font (sfnt) at offset 0xB641 10668 bytes