Malicious PDF — malware analysis report

Static analysis result for SHA-256 a495ad0f729fe923…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 21:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e1fe8869284d509954b07aefb06a2bb SHA-1: ef0b823024201d179e91b51a518203b52a54ddc2 SHA-256: a495ad0f729fe92353e464862311d8c5a4230a8e9bfe7528369273054c202476
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.ru/wix?keyword=livre+terminale+s+physique+chimie', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous Shopify-hosted PDF links indicates a coordinated effort to distribute content, potentially for SEO manipulation or to host further malicious payloads.

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/wix?keyword=livre+terminale+s+physique+chimie
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/61343625449.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/bastien_piano_basics_level_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/42712580735.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/moponebur.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/answer_me_lyrics_ishawna.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/bozi_boziana_audio.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/pogoxugagamojuzokigev.pdf
    • https://cdn.shopify.com/s/files/1/0436/5392/2981/files/factoring_trinomials_a_not_1_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/mesiforopawokukafozer.pdf
    • https://static.usrfiles.com/ugd/a58b01_316a0fab9a3b4d878aaf9a4b47f8f914.pdf
    • https://static.usrfiles.com/ugd/ca300b_c2234617d4404b959378c2c964030264.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bedf9e09c29401ab5e7aa4503b9ba88.pdf
    • https://static.usrfiles.com/ugd/eaf48f_787737ca199d4dd79771fc99bf62b826.pdf
    • https://static.usrfiles.com/ugd/a467d2_ad52d5b68e3e48a6aeeff853206a3562.pdf
    • https://static.usrfiles.com/ugd/b8c837_570843dfa00848aa8f001642ff081495.pdf
    • https://static.usrfiles.com/ugd/eaf48f_b53274bb47904feeb29302530d0b3201.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
stream_004_off00006f80.bin
ede67263a0c7cae8dd9f75824fbb6b103e49772916de9cba966d2d94694996f9
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6F80 11600 bytes
font_00_sfnt_off00005e16.bin
7ecc7cf25c1fd1d0d0ed002b84851a91e5bebfef1056b1610d19bbd9dde6878c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 5172 bytes
font_02_sfnt_off000094dc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DC 4324 bytes