Malicious PDF — malware analysis report

Static analysis result for SHA-256 271eca00b20585cd…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 22:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0e1747d24435ca693eb8f9c2f465f2d SHA-1: 69f052d40410d83febe77e85f02bfda4a9227314 SHA-256: 271eca00b20585cde7fec7e99180c8432716f40c6b49518ce187bf6688c33246
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a tutorial for Adobe Photoshop CS6. The document body is heavily obfuscated but contains the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to drive traffic to malicious sites. The primary malicious IOC is the ttraff.cc redirector.

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=como+usar+adobe+photoshop+cs6+roz%25C5%25A1%25C3%25ADr
    • https://cdn.shopify.com/s/files/1/0436/2049/9616/files/18809587119.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/gobubi.pdf
    • https://cdn.shopify.com/s/files/1/0449/7866/7688/files/36287634996.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6102/files/ledozolik.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/besame_mucho_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/63087732915.pdf
    • https://cdn.shopify.com/s/files/1/0437/8515/8807/files/pepolizabaporizarabizebaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/livre_d_anglais_traduit_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/vuetify_data_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/tunugadop.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/nelut.pdf
    • https://static.usrfiles.com/ugd/32777b_bfb9d7367bbe4a4cb0879873b7aec29a.pdf
    • https://static.usrfiles.com/ugd/b8c837_202350c6c4b54632af88f8da9d74f51a.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_off0000660e.bin
44d4b5a7f26875b053db174961534e2ba9ed756f67b23b0bc9a14cfe6a9a4034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 5792 bytes
font_01_sfnt_off00007921.bin
8310ffe08dd5ab385c90767195ebbc1011f7f81c550517989faa66e32ae06567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 10764 bytes

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