Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d280862732d9c34…

MALICIOUS

PDF

46.9 KB Created: 2020-08-18 16:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cbe2ffb1a1708eabf1dfbbe666b0e8f SHA-1: e90841e1af17ddd3fbb0b5388576c4036a35b878 SHA-256: 1d280862732d9c34a458bf93af40b545ee918fbbec9b93091ca8154e66916e63
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'H pylori guidelines uk' and the malicious URL 'https://ttraff.cc/pify?keyword=h+pylori+guidelines+uk', suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious 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.cc/pify?keyword=h+pylori+guidelines+uk
    • http://files.saltwaterstudios.co.uk/uploads/1/3/0/7/130776272/maxizidurolokow_jemus.pdf
    • http://dumuwa.markwarrencoleman.com/uploads/1/3/0/9/130969465/petawo_lazodaduxid.pdf
    • http://wikunab.easyflighttravel.com/uploads/1/3/0/7/130739560/zakivuteradetef.pdf
    • http://penus.jolietcentraldrama.org/uploads/1/3/2/8/132814930/9ca95bfe1f438.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/36082401.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/fojujudotironevoximu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/97230161631.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/administrao_financeira_e_oramentria_minhateca.pdf
    • https://cdn.shopify.com/s/files/1/0445/3515/2804/files/joxugagasewule.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/9338982576.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/59748319354.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/fofowoxepuvubumenosotez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/pdf_watermark_remover_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/10760507803.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/mbs_to_gbs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/xusebamemadidisavidijamo.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_off00007b49.bin
7058605ed5ad0984227c7968524ec6bdbeea690173ad21585025b8e0202ce50e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B49 5044 bytes
font_01_sfnt_off00008c85.bin
62923d5a40410745628e2812107c709950a5f3314074ec45621730d042fa51b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 9972 bytes