Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf621660a29f472e…

MALICIOUS

PDF

34.6 KB Created: 2020-08-30 10:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3ecee6beaeaeb4e93a4af8fd282cec SHA-1: 1e1a241121a7329ef06c722ccfcfa4f1fc143613 SHA-256: cf621660a29f472edb51cf5cdd1393089cd3187f571949be744e36f9d498f9ba
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.cc. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure for users to click on it. This pattern is consistent with phishing or malware distribution campaigns.

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=insurgent+full+movie+free+online
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/femeridagisugimolut.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/gijovax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/veranebew.pdf
    • https://static.usrfiles.com/ugd/b8c837_4646e54ddc0649e38460ee08418bcde8.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_5b6cac515b794b97ac0987bdd9cbedbd.pdf
    • https://static.usrfiles.com/ugd/913720_ba15fb82131847bcb093a655bc30adc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_78dc4acaef3a41d4bac33137316ff669.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/92880334759.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3493/files/68502721180.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/43933106576.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/24056006510.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/52977267683.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/history_of_crime_fiction.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/centriolos_estructura_y_funcion.pdf
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/holy_bible_catholic_edition.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_off00004ae7.bin
51550651dc3b93719560093508be2ac94923f053eaf34b64fb5b0317838965b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE7 4872 bytes
font_01_sfnt_off00005b68.bin
d2882a000050019b804548c68796ab523802d66b3da1cd3aec55c1f0fec225d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B68 9584 bytes

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