Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbfa739ef24124e…

MALICIOUS

PDF

46.9 KB Created: 2020-08-10 09:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 009043073949a6b183a7c835055da9e7 SHA-1: 3e710abd03ae49d41d406146690169a8ea75e095 SHA-256: 8bbfa739ef24124e329a03e299fe2568e649a3cce88bc9dbf7bc2297d84aa370
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though malformed, contains the same URL, suggesting a lure to a malicious site disguised as a PDF. The primary malicious URL is https://ttraff.ru/pify?keyword=grados+de+retinopatia+diabetica+pdf.

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=grados+de+retinopatia+diabetica+pdf
    • http://files.fostercarecoalition.com/uploads/1/3/1/3/131380842/tefatux.pdf
    • http://kurow.martinsrestaurantcayucos.com/uploads/1/3/0/8/130815017/vivemasogula.pdf
    • http://nanofiva.vibedanceacademy.org/uploads/1/3/0/8/130873995/bufoburizefax-roroduponin.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.mootingsyndicate.org/uploads/1/3/1/4/131483253/lewotidedimitufemini.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/34217086293.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/varasixubajapako.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/lavoribomuzatezuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/jejixus.pdf
    • https://cdn.shopify.com/s/files/1/0439/6256/4766/files/41052330061.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/67955895002.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/l_appareil_genital_de_la_femme.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/managimiragulo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/10030343515.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/modelo_neoliberal_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/67083795343.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/mumasavipugazadofivuroz.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/fefebuzigowepufame.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007493.bin
0456fd20318db1ff761b55f5b53b8cea15f678f901d9f14d56cb48dc7fd6d568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 5288 bytes
font_01_sfnt_off0000869b.bin
869f9c5c2daae88d9ca8c7b7db2f71a7a91c2a55de53e438ea4e059be55f05f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 12084 bytes

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