Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c987b2337601e35…

MALICIOUS

PDF

48.4 KB Created: 2020-08-07 20:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81f20947744d89166ef6e5ef5f357586 SHA-1: a8a26f875dece7e4f95f4fe30f4490afa5df996d SHA-256: 2c987b2337601e35ab02a3be0ec2bc1399e8c2022cfb2736593d644b3ec32346
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt, likely to drive traffic to the malicious redirector.

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=adjectives+definition+and+examples+pdf
    • http://files.lv-connect.org/uploads/1/3/1/4/131406717/d3b7d9310.pdf
    • http://files.krystynwypasekdesign.com/uploads/1/3/0/9/130969944/4123634.pdf
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/vividukilavivafopezur.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5467/files/rorigalifesofatika.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mella_thiranthathu_kathavu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/30266586988.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/16066198631.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/26118561595.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/articulos_cientificos_de_quimica.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/vobilezexexuwidajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/21583108116.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/14031776644.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/ruguxejovinokiwagek.pdf
    • https://cdn.shopify.com/s/files/1/0436/6735/7846/files/68679265640.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93236297381.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/free_johnson_outboard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/54730477050.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_off00006798.bin
c0a351b6ed31656c93dfe872787318684ea250a708f340ed77706c66a6fb7ff6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6798 5184 bytes
font_01_sfnt_off00007932.bin
df4bab816529942fac5fe7a63948b27d356ced193b2a6dcef8556ea7d6c28734
pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 14632 bytes
font_02_sfnt_off0000a646.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xA646 4324 bytes