Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c441bc7f0204643…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 02:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff0ef41b5b6d540b3f494471abca3131 SHA-1: 9186397132d1a85136530dbf5662acdf495a81d4 SHA-256: 1c441bc7f02046435edea0053fbc56c000f7ce7e918fe571cd6f8a733a435c71
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded links, with the primary one being a redirector. The document body, though heavily obfuscated, contains the suspicious URL and a link to a Shopify-hosted PDF, suggesting a lure to a malicious site.

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/pify?keyword=broadsheet+port+melbourne+breakfast
    • http://files.discoveration.org/uploads/1/3/2/7/132710780/9bdde4.pdf
    • http://files.connieoconnorart.com/uploads/1/3/0/7/130775403/dabitezamapu.pdf
    • http://files.destination-pickleball.com/uploads/1/3/0/7/130776575/rebepirosinija.pdf
    • http://files.bridgetghunt.com/uploads/1/3/0/7/130775747/7107167.pdf
    • https://cdn.shopify.com/s/files/1/0436/5585/6281/files/pumotovubufuridanige.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/amazon_cloud_reader.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/catalogue_oriflame_11_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/dokarabipedipaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/motadovilevifirojek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/70652948692.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/71280145612.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/diludenavopole.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/baseline_survey_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/zudujafujulasilutisi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/form_m_1pr.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/70123971780.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/zoputikagofajawetofekom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/61635072105.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_off00006d59.bin
c1fa83e6a9db5cc5550fb5ffaa84d1999a60a284478d1659a8bc8f07c755380d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D59 5532 bytes
font_01_sfnt_off00008005.bin
ee01332339fdfdd0f104d8caf04f08cee4ca25feaf6c4ff2b358881265768a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8005 10644 bytes

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