Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb6647bd38554b1…

MALICIOUS

PDF

46.9 KB Created: 2020-08-26 06:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0405e9b2b65df9c58112b22881b4635a SHA-1: d05b0c71d370a573f6040ccb7b602e537f209a14 SHA-256: fbb6647bd38554b1e9dc141bfe2c35451ca6af2439419e7d657d2df5e9e40f7b
150 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a malicious URL, disguised as a guide for making a kitchenaid mixer cover. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to lead users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL which is likely used to serve further malicious content.

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.club/pify?keyword=how+to+make+a+kitchenaid+mixer+cover
    • http://files.marissagagliano.com/uploads/1/3/1/1/131164452/d1e3f.pdf
    • http://morujes.embodyfitnessandnutrition.com/uploads/1/3/0/7/130740178/a05776ced163f.pdf
    • http://jelurudi.countrygirlcocktails.com/uploads/1/3/1/4/131453603/b7d5dace9e8090e.pdf
    • http://files.richardsavenuebusinesspark.com/uploads/1/3/1/4/131407284/8092932.pdf
    • https://cdn.shopify.com/s/files/1/0463/7078/3393/files/dishonored_2_emily_powers_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/caelum_apostilas.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/68354520143.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/liwew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/sum_of_calculated_column_in_rdlc_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/kogiruguzivukib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niriliruvurufuwupaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/74259682432.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fasexerogetotano.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/bajozilupupuduxem.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/88379512705.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/manual_de_planos_arquitectonicos.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_off000077e3.bin
31ad33407174a4203718f6c7bf3674c174b656425fe916236d2481457e50b67e
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 5216 bytes
font_01_sfnt_off00008988.bin
7e20971890c600e47c50c366d853ee60930949d383777ce8eace5353b2148953
pdf-font-stream PDF embedded font (sfnt) at offset 0x8988 10872 bytes