Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41ece4371bcfb28…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 03:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92ae040fc8189fceb7bfcebfff8711e0 SHA-1: d39ff7fd3c2721ac7b86080a5c9530b17125c57d SHA-256: c41ece4371bcfb28cbb9f37cc3226521f36c5e62adf6c2fea04fd159d53edc57
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=bgp+interview+questions+and+answers+ebook'. The document body, though partially corrupted, suggests a lure related to 'bgp interview questions and answers ebook', aiming to trick users into clicking the malicious link.

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=bgp+interview+questions+and+answers+ebook
    • http://files.ssjo.org/uploads/1/3/2/7/132741241/77d6afe305861d.pdf
    • http://files.barrons-australia.com/uploads/1/3/1/4/131437276/butunajitejo.pdf
    • http://defudufi.natrulay.co.uk/uploads/1/3/2/7/132712050/lijadatawori.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1142/files/research_paper_writing_tips.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/advanced_excel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0461/3498/4857/files/zelun.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/76241359160.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/58524018012.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/acid_base_equilibrium_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/26585446281.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_off000067b0.bin
73b4fef928a2eb534507f2c77ad010a1f137b89bc628859e00005fb60461605e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 5624 bytes
font_01_sfnt_off00007af2.bin
d9a037c04f02c4c82b199dbfa4865e532c1ad200bb357a1efb5a2c14e9185212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 10252 bytes

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