Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad8ea899e33c625…

MALICIOUS

PDF

47.4 KB Created: 2020-08-22 20:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 042f2538837b2fc2a123a022aad9f965 SHA-1: 4762050d72706794c31fcc2140939c7e789ddff9 SHA-256: dad8ea899e33c625382012e89d7503a3da8d9d95101f983515ba75351e141386
128 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a worksheet, which redirects to a known malicious URL. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The presence of a visual download button further supports a deceptive workflow. The primary malicious indicator is the redirector link, suggesting a phishing or malware distribution attempt.

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=balancing+word+equations+worksheet
    • http://files.kyledaviesmusic.com/uploads/1/3/1/3/131398598/9748586.pdf
    • http://files.zionstone.co/uploads/1/3/0/7/130776575/4bf6ab2cc643.pdf
    • http://naserali.gracklehouse.com/uploads/1/3/0/7/130775818/toxibelafinema-zadulosexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3751/files/bescherelle_les_verbes_francais.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/juvivekuvorarojuwam.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/24253974531.pdf
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/vuvuvikilatumamejojotire.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/19344087757.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/nevekewogoguj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/10035595621.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/wiwuwazow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0168/files/all_souls_trilogy_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2933/1100/files/66572069841.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/96384424009.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_off00007074.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7074 2828 bytes
font_01_sfnt_off00007a6f.bin
912c1f56cbc6ae6c3e426dff2353f51fd4d35f92678a126db5bfd6ac0416890b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 5532 bytes
font_02_sfnt_off00008d35.bin
50f1582bf2368722c8c4a312922d2795638cb2e0861bb7962425c158cf456646
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 9768 bytes