Malicious PDF — malware analysis report

Static analysis result for SHA-256 df637ac5742f7765…

MALICIOUS

PDF

45.8 KB Created: 2020-07-31 18:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 638247e333fa60ca8d7cb075e251c645 SHA-1: c9f2f49239c5c77fc159a0277d1b5f42d16e7752 SHA-256: df637ac5742f7765b144f5fd117043f3cb1cf3023ac53d93461a67d5235674c2
140 Risk Score

Malware Insights

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

The PDF contains a lure impersonating a cloud document sharing service, aiming to trick the user into clicking a link. The primary link, 'https://ttraff.cc/pify?keyword=how+to+uninstall+dropbox+on+mac', is identified as a malicious redirector. The document also hosts a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm for SEO manipulation or to distribute further malicious content.

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=how+to+uninstall+dropbox+on+mac
    • http://files.christineharvelltherapy.com/uploads/1/3/1/8/131871874/4425046.pdf
    • http://files.svdynamicdojo.com/uploads/1/3/2/8/132814119/605bfd89eef2fd4.pdf
    • http://files.diamondbackcombatives.com/uploads/1/3/1/4/131438541/49210c9a82168ad.pdf
    • http://files.sfabsm.org/uploads/1/3/2/6/132695663/fbe2c60.pdf
    • http://files.gotophillytemple.org/uploads/1/3/2/6/132682785/2272363.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/netexixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/fezozefap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/22677416947.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/burozutarowoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/73792052170.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/58326480941.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/gijow.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/36590664440.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/susefovofel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4966/files/17531175587.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_off00006772.bin
11be959c20836e841fbf5ef04e04ed1a7a8bcf85018f4d3552c1f55c985ad804
pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 5244 bytes
font_01_sfnt_off00007930.bin
442359e17e83299a567d228bfe5552889fee974f82827a07e86304ac174069eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 10172 bytes
font_02_sfnt_off00009c0a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0A 4324 bytes