Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b3e8f2309290f8…

MALICIOUS

PDF

43.1 KB Created: 2020-08-07 22:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2170b15a20753f868c2cfc9477a2a17d SHA-1: 70ddfac18ce9d9b65895e3494de163e1ffe40b54 SHA-256: b7b3e8f2309290f88fbe6a2357fce733a7559f965f49206b3f531a3a25683eb9
162 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks. The primary malicious URL is https://ttraff.com/pify?keyword=double+entry+accounting+system+pdf, which is likely used to deliver a secondary payload or phish for credentials.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.com/pify?keyword=double+entry+accounting+system+pdf
    • http://files.thistallawkwardgirl.com/uploads/1/3/0/8/130813364/525983.pdf
    • http://files.hayseedcafe.com/uploads/1/3/1/3/131379371/0a12d946e5d313.pdf
    • http://files.hannahchambers.net/uploads/1/3/1/6/131637043/dibolerux.pdf
    • http://files.nhappyandbeautiful.store/uploads/1/3/1/4/131454373/4574184.pdf
    • https://cdn.shopify.com/s/files/1/0437/0667/9447/files/vatajeliz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/5244483805.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/ivy_sherwood_porn.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/jubojururekupaxugewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/21524218334.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/aha_acls_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/puditebesa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/47967779320.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/google_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/86308936142.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/dyson_dc14_manual.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_off00006947.bin
483917aaebdc65a93535409f4ee5eb9e2c8e341ad419a8dc27bd4aff2bbaca46
pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 5716 bytes
font_01_sfnt_off00007caf.bin
d02fea2301bc6b05d97d435306c2f8e87c7a8b5bd5cf215fa6e3285460d68679
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAF 10276 bytes