Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4e8b3f6ef9ca1d…

MALICIOUS

PDF

38.5 KB Created: 2020-08-21 06:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ca37cd82ecfee6187d3b99203cbfb3 SHA-1: d6316ff035d5ecfcb8f1476eb3508ee7eb52e614 SHA-256: ea4e8b3f6ef9ca1dab67b59e04029c6def1e55a7ab39a0df40c45a2d9bbd03dd
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the target URL, reinforcing the lure. 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.ru/pify?keyword=ard+mediathek++chrome
    • http://vaguto.chefmikescharcoalgrill.com/uploads/1/3/1/4/131406082/wukabuvot-turogaro-posukom.pdf
    • http://files.barbarasuebrodie.com/uploads/1/3/2/8/132814073/1635928.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/english_vocabulary_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0116/5462/files/zixituxojosizokan.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/fegobab.pdf
    • https://cdn.shopify.com/s/files/1/0447/4860/3546/files/84187437282.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/printable_bingo_cards_1-_75.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/scorecloud_studio_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8336/files/dodejuvedogupix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8189/1989/files/95583402356.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/renewing_drivers_license_alabama.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/23272825158.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2694/files/blur_background_pic.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/funciones_de_los_canales_de_distribucion.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/thinking_in_java_download_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/internet_speed_meter_lite_premium_apk.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_off000058e3.bin
c45540b04c0066084afa6519b03df7ff2453f9529640a9e45078cb7d15a53385
pdf-font-stream PDF embedded font (sfnt) at offset 0x58E3 5020 bytes
font_01_sfnt_off000069bd.bin
52f28d2f7d16800ea7163808dc4bbb9d541b555ff80d2aa58e9421619899ef97
pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 10360 bytes