Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bae7e3efa55c6d…

MALICIOUS

PDF

38.9 KB Created: 2020-08-11 04:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d0b5c78cf27f25c8ea72fc7c8b66da SHA-1: f1eb883d5c215b3c9613004777561405a1566859 SHA-256: d2bae7e3efa55c6d78f4f6c21ed12ba07c87ad705c07c0b9c473e3646bdde5dc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as free book downloads, with the primary link redirecting to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection. The ML classifier also strongly indicates maliciousness. No scripts were extracted, but the document body and heuristics point to a social engineering lure to drive traffic to a malicious site.

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=adorsho+lipi+book+pdf+free+download
    • http://files.stephaniearnoldcello.com/uploads/1/3/1/6/131636726/zezusikesuwasu.pdf
    • http://vuwatofe.oakislandgold.com/uploads/1/3/0/9/130969744/6bfd4b1f9.pdf
    • http://files.madisonhaines.com/uploads/1/3/1/0/131070523/af3fa172c25964e.pdf
    • http://files.getitwright.com/uploads/1/3/0/7/130776788/pufim-fafopunatobi.pdf
    • http://files.joyfulnoisedoula.com/uploads/1/3/1/4/131483275/bimuwupulatiwaruwaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/19342739302.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/39011574368.pdf
    • https://cdn.shopify.com/s/files/1/0430/0491/9971/files/meditations_marcus_aurelius_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/jovoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/famous_books_and_authors_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/90919492775.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/doki_doki_literature_club_poems.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/gimuzubuze.pdf
    • https://cdn.shopify.com/s/files/1/0435/9618/5763/files/el_rey_arturo_ylos_caballeros_de_la_mesa_redonda.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/dtv_atlas_astronomie.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/zomumifamusokevorurogejul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c85.bin
dc0b3147c71503ac8804be51033d9fb54dc7fd4a638b22bf27ab80b3508e5b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C85 5124 bytes
font_01_sfnt_off00005de3.bin
ea9fbb1c172410a5871dfa176a961e05500c51e2db3b1273c723b5330b971aba
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE3 10376 bytes
font_02_sfnt_off0000809f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x809F 4324 bytes