Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25734871844c783…

MALICIOUS

PDF

49.6 KB Created: 2020-08-04 11:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e9b0ea18c6eb41b45307fccffd35bb SHA-1: 007d02abe12b1d5915d2c69d6b20576bdcf5363d SHA-256: f25734871844c78369719fe5906ca16d7c71582169e2c74fc0219c9808e92e23
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on Shopify, likely for SEO poisoning or distributing malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack vector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=make+room+casting+crowns+chords+pdf
    • http://files.david-jones-society.org/uploads/1/3/0/8/130814642/dixagululekivex_tekixomixe.pdf
    • http://files.gopherstatefire.com/uploads/1/3/0/7/130776745/d56889.pdf
    • http://files.youthinequalityjustice.org/uploads/1/3/0/7/130776142/liraduxutapig.pdf
    • http://files.pandos.org/uploads/1/3/0/7/130740510/8715011.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/jusopad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/vakituka.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/wuzipegidarulejometokid.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/karozixego.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/fogudakokatenelev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/vikuvenisusalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/fimigunuviris.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/secured_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/buyer_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/1242/1789/files/html_state_dropdown.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/dark_souls_2_sunset_staff.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/82012149266.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/python_dictionary_to_json.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_off000072ec.bin
57bb9bce6ae7d0a620eefeaecf867ac15b00e0cd3de2f06e0dfb69c0257349db
pdf-font-stream PDF embedded font (sfnt) at offset 0x72EC 4404 bytes
font_01_sfnt_off00008268.bin
7070ecb4745f48f40127c1944fcc0d90afebf4a0c6b2f68046c6c43227809fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 5700 bytes
font_02_sfnt_off000095c2.bin
e5ae6a21c603b415c9cd67584bd6d98f4eec5e67a2d67785704fc2a83fc02b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C2 10276 bytes