Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f3a4305a0ed4e2…

MALICIOUS

PDF

62.4 KB Created: 2020-08-08 18:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9827e1013a60c9b7d42e42655d7bffdd SHA-1: a1dfbd91202eb40b3c85c5a1ee93eb73b7b0b214 SHA-256: 56f3a4305a0ed4e2f65a89a1c5b5ceb92b171d7cd469adccfeecbcc8d778c05d
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with a lure of 'Catholic bible download pdf'. The heuristic firings indicate this is a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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=catholic+bible+download+pdf
    • http://files.alexklein.net/uploads/1/3/0/8/130814124/2ab26759e0.pdf
    • http://files.pcconcertseries.org/uploads/1/3/1/3/131381799/1599755.pdf
    • http://files.saloteflorist.com/uploads/1/3/1/6/131606056/mazabaloja_wavonado.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • http://surel.betterworldwindsurfing.org/uploads/1/3/0/9/130969060/4b616.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/26918295119.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/logistic_regression_odds_ratio_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/sql_server_tutorial_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/pegabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6445/files/characteristics_of_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/11843813184.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/redizaforomedegadixeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7786/9476/files/95659657790.pdf
    • https://cdn.shopify.com/s/files/1/0440/8541/1990/files/ametropia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0436/5464/3877/files/borg_scale.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5831/files/itunes_linux_mint.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/welarexasakodobezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/84989532555.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_off0000a08c.bin
d60d2bf21b8966499e1eb221b06d4a6b9d4d011f8e1ab988ae6b5e1ce4f47ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA08C 5108 bytes
font_01_sfnt_off0000b1fa.bin
056348473db31d1ffc194b1a9be4841db8175a2bb0d253b1bd94cd9c5162da73
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FA 10892 bytes
font_02_sfnt_off0000d765.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
pdf-font-stream PDF embedded font (sfnt) at offset 0xD765 16036 bytes