Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa83ab0c09bbea5…

MALICIOUS

PDF

41.0 KB Created: 2020-07-10 10:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f074b2d0872c742a7fd08d624271559 SHA-1: 1f9afbc7a4b7a289129733ac1a2f3e8dbc0c46ba SHA-256: dfa83ab0c09bbea594c60cdacc9d9b823c34114b5841e26e4ea7ebd8de7918e5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic flagged it as a PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/wb?keyword=reportage%20merkmale%20pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicated a large number of external PDF links, with 'http://files.alexaelizabethdesign.com/uploads/1/3/0/8/130874018/revekono.pdf' being the first example. These findings suggest the document is designed to lure users to malicious or SEO-manipulated content.

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/wb?keyword=reportage%20merkmale%20pdf
    • http://files.alexaelizabethdesign.com/uploads/1/3/0/8/130874018/revekono.pdf
    • http://files.dbs-fabrication.co.uk/uploads/1/3/2/6/132681156/8831980.pdf
    • http://files.belindanye.com/uploads/1/3/1/4/131438366/5304761.pdf
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdf
    • http://files.rawyoganz.com/uploads/1/3/1/3/131398279/9878205.pdf
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • https://nuvakujumul.files.wordpress.com/2020/07/85791436620.pdf
    • https://wuxafojibom.files.wordpress.com/2020/07/6440393688.pdf
    • https://vilefulidexu.files.wordpress.com/2020/06/fasejenodopiwolalurabebe.pdf
    • https://jowixen.files.wordpress.com/2020/07/pazovedazijojutop.pdf
    • https://fesigol.files.wordpress.com/2020/06/3878198938.pdf
    • https://baveriwada345211056.files.wordpress.com/2020/06/bodadukiganesugodulir.pdf
    • https://pasamel.files.wordpress.com/2020/07/kegajapupiwosesulevip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.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_off000063dc.bin
6b3bd911968afdaea5f05768cc6c12de3616f306c8caf8c9aa80c57a75e7f623
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 4888 bytes
font_01_sfnt_off00007490.bin
334421cb634daf6da50b93c96c1efad08939189c42cab042d11623716cbf790c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7490 10200 bytes