Malicious PDF — malware analysis report

Static analysis result for SHA-256 930420a9de1b0e57…

MALICIOUS

PDF

51.9 KB Created: 2020-08-13 23:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c177b50cf275c938565d72a7ca22e9b SHA-1: 8f0c4d81cf5e5e9bcfd2c445c2a7d9fe1f0b08ce SHA-256: 930420a9de1b0e57024e5f7b7ade07f65a0d1dede0dc401758ce1d88d1de94a7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though heavily obfuscated, contains text related to 'Bunk'd season 3 episode 1' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

Heuristics 3

  • 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.
  • 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=bunk%2527+d+season+3+episode+1
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdf
    • http://files.roger-pugh.com/uploads/1/3/0/7/130739593/5824091.pdf
    • http://fadisi.jordanback.net/uploads/1/3/1/4/131483337/5b726d54bc03.pdf
    • http://files.allisonsplaunphd.com/uploads/1/3/1/4/131408970/529778b8.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/saromadejujawavitorilax.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/77755921729.pdf
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/nuwitod.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/30181962047.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/alfa_laval_purifier_overhaul.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/84203135674.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/76169765568.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/40584009947.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/tinkers_material_traits.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2978/files/47622722948.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/dusesevawofojomisikiwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/masizaxuxij.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/la_campanella_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/33305400524.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006289.bin
9e0399a4bac8730326914cc34037381a54bee3caf37a16ddc612b7abd2415893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 4992 bytes
font_01_sfnt_off00007391.bin
e71d7f63834901ff696b85c6a971e076f3a51400a7147785bff7848f667b01c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7391 1624 bytes
font_02_sfnt_off00007bd7.bin
d129b68b2faceb1c2ebe4d217fc174335fed45c59d912cc2d3e0b3099f6d3d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 10192 bytes
font_03_sfnt_off00009ef1.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF1 16036 bytes
font_04_sfnt_off0000b35b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB35B 4324 bytes

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