Malicious PDF — malware analysis report

Static analysis result for SHA-256 8527f1362096e931…

MALICIOUS

PDF

36.5 KB Created: 2020-09-16 15:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0262aa09570982576b441f49b4a50282 SHA-1: 9ad3f8f4e60f625101ec765df5ac40bdb690eeb6 SHA-256: 8527f1362096e931e9716d0ad1534ef0ebdfd9c69fbdf5a22a7891d317e2ef75
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The document body, though partially corrupted, contains the URL 'https://ttraff.ru/wix?keyword=barn+door+floor+guide+wall+mount' which is also present in the heuristics, indicating a likely lure to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=barn+door+floor+guide+wall+mount
    • http://files.thecrossingsgahanna.org/uploads/1/3/1/3/131379113/dujinunorux.pdf
    • http://files.sfautismsociety.org/uploads/1/3/0/7/130739315/54d8eb1e7795.pdf
    • http://files.thecoastaldisplay.com/uploads/1/3/2/8/132814123/jaked.pdf
    • http://files.calvinsmiththerapy.com/uploads/1/3/0/7/130776255/zovupexo.pdf
    • http://files.fauquiercommunityband.com/uploads/1/3/1/3/131380966/redovagekos-kofagid-nobesurosozo-rafisarepamidi.pdf
    • http://mojabuz.landscapegardenerscamberley.co.uk/uploads/1/3/1/4/131483245/lebajojom.pdf
    • http://kilezul.cafecesura.com/uploads/1/3/0/8/130874601/3625273.pdf
    • https://f3b0f580-7324-4008-b020-8c91e79fbd4a.filesusr.com/ugd/01bc73_e125b248a4d24db6a67e869d4d8be3ef.pdf?index=true
    • https://5b0d4871-392e-4a1b-a071-73302b1174f5.filesusr.com/ugd/b56239_e3d1daeda039498b93b6d452e4c58090.pdf?index=true
    • https://c7ff36f9-5fc5-4258-9bfe-08a20dceba3b.filesusr.com/ugd/3ed902_13864a639fcd4d019f28bed0ddd11315.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/69937915735.pdf
    • https://cdn.shopify.com/s/files/1/0484/6826/3062/files/rolaxefupem.pdf
    • https://cdn.shopify.com/s/files/1/0440/6683/2534/files/78798025791.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/calathea_care_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/intranet_and_extranet.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_off000051c5.bin
d2c35dca819f541a168bc23800ef6e104b1ba64d21bf95f004075d8bf1db819e
pdf-font-stream PDF embedded font (sfnt) at offset 0x51C5 5192 bytes
font_01_sfnt_off0000636e.bin
4b2633eaf093641acb54ed0cf0f3877bcc8897e02cfd93600b34bccf2537ff88
pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 9896 bytes