Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b91d7a0da9623b…

MALICIOUS

PDF

73.8 KB Created: 2020-08-20 07:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 202398f5551316bd93186bc3c09756d9 SHA-1: 5cec0794f9e0979ccbbc2010535333f102b43b73 SHA-256: 98b91d7a0da9623b45c9bd2b1393ec746c0857c4a241142f8e682760fb2321a1
162 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'rewriting questions into statements worksheet' and embeds multiple external links. One of these links, https://ttraff.ru/pify?keyword=rewriting+questions+into+statements+worksheet, is identified as a malicious redirector. The document structure and the presence of numerous external links suggest a link farm or redirection tactic to lead the user to malicious content, likely an advance-fee scam as indicated by the heuristic.

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=rewriting+questions+into+statements+worksheet
    • http://files.cassondramoriarty.com/uploads/1/3/0/8/130813834/7110434f5ed0.pdf
    • http://favixipob.instinctemporium.com/uploads/1/3/1/4/131454207/luvapewevifijim_majusotulofumu_kazojopun.pdf
    • http://gupifimek.markweisner.com/uploads/1/3/1/3/131381489/1424341.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/pezulisawim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/a_short_guide_to_writing_about_art.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/jezufozovepagigukevuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/pozupogusaxuxukome.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/restrictive_and_nonrestrictive_adjective_clauses.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/55132022144.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/38146636509.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/rejikisewojew.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/24181453281.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/83686916462.pdf
    • https://cdn.shopify.com/s/files/1/0449/8548/3422/files/98368898972.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/rufixamujixusoduzisezumo.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_off0000db32.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB32 2828 bytes
font_01_sfnt_off0000e52d.bin
886293fed93e1586653407189a44385d56c570d266454b1801a5699a3fa6b7e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5356 bytes
font_02_sfnt_off0000f74e.bin
f5a9dc7977d8bbee9ccb3401f4c66d268523bdd3d606ce9c455f311f7d3d2c41
pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 9964 bytes