Malicious PDF — malware analysis report

Static analysis result for SHA-256 8645f55e53894a28…

MALICIOUS

PDF

44.7 KB Created: 2020-08-24 22:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c4ba6d22723e8cfbe95fb863805ccc2 SHA-1: 844d0c44316e78cfeaee5c6f15f1f462e18ce214 SHA-256: 8645f55e53894a287e4555d08c8be92e010d63185136d4fb3abc3cd947ff9ca5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.com/pify?keyword=business+english+words+with+meaning+pdf
    • http://files.intermodalmechanics.com/uploads/1/3/0/8/130874154/310728.pdf
    • http://files.doorbeopen.com/uploads/1/3/0/8/130814718/jepalujopefasuli.pdf
    • http://nozatebi.campatgalilee.org/uploads/1/3/1/0/131070161/5525859.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/5603978190.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/3424471972.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/oceans_chords_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/international_arbitration_law_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/tinkers_construct_reinforced.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/79317017192.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/zaxemenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/59355323875.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/97716097399.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/breaking_into_wall_street_financial_modeling.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/87862791796.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_off0000715f.bin
d07737aadf3109ef523a5b899a81ca17dce0a8a965e8209ca031da5e9711210b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715F 5596 bytes
font_01_sfnt_off00008443.bin
e29c9b617b37364c5ea6a54fb26e763a8b232a20da2fceee4d9b0fca2541627c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 9836 bytes

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