Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff18c3ba36a62df0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 18:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c6b7a8b73357f07a598c2b62a02540 SHA-1: 5fd2c107907ae707526d64151f75d847410353f4 SHA-256: ff18c3ba36a62df0d8c05620eec25f59cd611da61cc3b1235234db6d6140611b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=panasonic+kx-tga410+bluetooth+pairin'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution. The presence of a large number of other PDF links, many hosted on Shopify, suggests a link farm SEO tactic to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=panasonic+kx-tga410+bluetooth+pairin
    • https://cdn.shopify.com/s/files/1/0434/0128/1703/files/duparesetisiwiwojomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/biryani_hd_making_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/bescom_payment_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/skyrim_requiem_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_423207164244401794b466760c6e51b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c158ba2cfbc04189b35daf60ae48f1cc.pdf
    • https://static.usrfiles.com/ugd/0c268c_572a44ba0f6d464c8e455835dc177327.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/kalnirnay_calendar_2020_marathi_march.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/76266697704.pdf
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/albela_sajan_aayo_re.pdf
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/sequencing_decimals_worksheet_year_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/79672192422.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/20475696767.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/22466068547.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_off000051ec.bin
0c856808787f7a37d42e25653bd94c7ef68adfa1ad6cee9669731b5958a5b497
pdf-font-stream PDF embedded font (sfnt) at offset 0x51EC 5664 bytes
font_01_sfnt_off00006536.bin
94e952f529bdc460954b69a1882721b61ea27b477f4e0d7ac8e2d736ed229207
pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 9848 bytes
font_02_sfnt_off00008709.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8709 4324 bytes