Malicious PDF — malware analysis report

Static analysis result for SHA-256 f366106f95771ef1…

MALICIOUS

PDF

44.9 KB Created: 2020-08-23 19:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c11080d3d635f0062a908f88577aacd SHA-1: 3e69705a02b24426e8a54a48ffbbb9ab2da7a837 SHA-256: f366106f95771ef159a9664e8b2493f2e09cee1a2cc233c4ab0b067347a774de
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique commonly used in SEO spam and phishing campaigns to drive traffic to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=android+developer+blog+%25E6%2597%25A5%25E6%259C%25AC%25E8%25AA%259E', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=android+developer+blog+%25E6%2597%25A5%25E6%259C%25AC%25E8%25AA%259E
    • http://dulusizo.happykidscambodia.org/uploads/1/3/1/3/131380265/nafobejenasexijomus.pdf
    • http://paxifojed.reassure.us/uploads/1/3/1/4/131452836/3064879.pdf
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/486123682.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/30485159835.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/house_rental_lease_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/70591874479.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/3rd_year_bams_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/kogakojalaleladeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/physical_science_book_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/51137013135.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/muluguzelo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/danidola.pdf
    • https://cdn.shopify.com/s/files/1/0435/9811/9075/files/mamulode.pdf
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/wubotulinafarekilexepofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/bobufur.pdf
    • https://cdn.shopify.com/s/files/1/0465/1584/7318/files/nelagasetuwepusilopema.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064da.bin
5ed32d0a2afc08edc2ded79c3fd20079e2c6697ad1b852bcbb8c0ac826aabff9
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DA 3344 bytes
font_01_sfnt_off000070bc.bin
6878a30891dcd9ab945f147a340b926f0cb5d684dea548df3d48e25423079aa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 4928 bytes
font_02_sfnt_off0000818f.bin
1ee77253439fd9273dc849d8ec91fd1489cc1e86bd4fa30951b79a8dd404b7da
pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 10236 bytes