Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1045b97b29a663…

MALICIOUS

PDF

35.5 KB Created: 2020-08-23 18:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad147323eee703522746253b1972e795 SHA-1: 8f88d4dc567f0038c8adc643ba7f54997e8a9224 SHA-256: 2a1045b97b29a663f38bb1c7cb00a96f638b77e9c5df2924d06558e123ef135e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the text "Paediatric asthma guidelines sign" and the malicious URL. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are hosted on cdn.shopify.com, with the first listed being a potential lure. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=paediatric+asthma+guidelines+sign
    • http://files.kiwibirdphotography.com/uploads/1/3/1/8/131857476/f0a1ef182175e5.pdf
    • http://files.phithetapsi.org/uploads/1/3/1/3/131398380/30321eec6337.pdf
    • http://files.dns-for-me.org/uploads/1/3/1/8/131857758/vexix_visaxuge_zopawe.pdf
    • http://files.laurascreativeattic.com/uploads/1/3/2/7/132712080/wubud-devub-bimisud-nepoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8411/1267/files/merge_two_git_repositories.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/yamaha_command_link_plus_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/depusexilapugusaviguseziz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/litezigarugotomifi.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/10768037470.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/rupexifabamik.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/suzafazobe.pdf
    • https://cdn.shopify.com/s/files/1/0463/1196/4829/files/ffx_blitzball_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/fugibopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/lebemeguvevatitofetu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/the_strain_trilogy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/bootstrap_template_creator_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6928/files/argosy_property_annual_report_2018.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_off00004d74.bin
e094d55476f474ac61ffdda82801d7fc4d3e1b8006e86788af2a807e09e81b11
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D74 5352 bytes
font_01_sfnt_off00005f7c.bin
2f1215dae65bdbbd71dc3f7ba4745fc001602ce4fab8acb6f4b7c9c6232a92f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 9932 bytes