Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0db2206baa02c0e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 04:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 771ea3577c2b7d6f403308979a38961d SHA-1: 1aa1e01eada125c2224763b2eef8e2b68d3a2dfd SHA-256: a0db2206baa02c0ea7128f93d7f77b4e59eb70e36b310acad92f70ef39ceeab3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body itself is heavily obfuscated but contains references to the malicious URL and several benign-looking Shopify URLs. The primary attack pattern appears to be a link farm designed to redirect users to malicious content or for SEO manipulation.

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/pify?keyword=a+horse+walks+into+a+bar+pdf
    • http://files.neslle.com/uploads/1/3/1/8/131871864/bogugavoxij_viwimi.pdf
    • http://files.thinnerstrongerhappier.com/uploads/1/3/0/7/130738971/60ddc79.pdf
    • http://files.alinasab.ca/uploads/1/3/0/7/130739376/2066002.pdf
    • http://jugasetok.broadhorizonsenglish.org/uploads/1/3/1/4/131482803/c32c592f24fe72.pdf
    • http://dujafata.guqintables.com/uploads/1/3/0/8/130874565/viguwok_wavisup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/biology_mcq_pdf_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/online_converter_to_doc.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7429/files/zejan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/84070703884.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5877/files/51959998665.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/15096462632.pdf
    • https://cdn.shopify.com/s/files/1/0435/7813/0593/files/zixezivonuvilajibakuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/fuwizilametuvuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/airway_management_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/88605295104.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_off00006515.bin
a363ec87b7514ee6e6d8e1e1718ea8dd88ae122a089880269550009437be4d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 5412 bytes
font_01_sfnt_off00007782.bin
621dad3c639d952bb6cd9358987b6ce203278112aac9212f583b80977fb47c9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 11192 bytes

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