Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbb76ea187b05ac…

MALICIOUS

PDF

48.1 KB Created: 2020-08-29 23:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 935699567a5dcfe7d26fbbbec4045e65 SHA-1: 6a7b7b12d3baee7b3e720921544186d0eaf2401f SHA-256: 2dbb76ea187b05ac6853154e9cf762278a87cc3e12eb202ad4fd1047bb053641
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'ttraff.ru' which is likely used to serve a malicious payload. The document body and heuristics indicate a lure to download a file, potentially disguised as a game or software. The presence of a large number of external PDF links also suggests a link farm used for SEO poisoning to drive traffic to malicious sites.

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/wix?keyword=pajama+sam+2+download
    • https://static.usrfiles.com/ugd/07e02c_e1bff18a8a644a06b596d4c4a84d3f04.pdf
    • https://static.usrfiles.com/ugd/b8c837_a780ce450f614092ad228dac8e8e6997.pdf
    • https://static.usrfiles.com/ugd/b8c837_11a53feb3f1d4891977363a9b9ba0a44.pdf
    • https://static.usrfiles.com/ugd/b8c837_855f1828950c49308e396aa98137963a.pdf
    • https://static.usrfiles.com/ugd/b8c837_80ddff1bc8594646bfc8c3a814828499.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/nudibulowuzufirosefalax.pdf
    • https://cdn.shopify.com/s/files/1/0450/7372/7651/files/suvurazasaruwejore.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/99_fishing_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/form_100-_es.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/gunus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/fafesabumaritapitiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/analytic_philosophy_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7912/9501/files/detalhes_construtivos_da_arquitetura.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8298/files/80079002104.pdf
    • https://cdn.shopify.com/s/files/1/0465/1106/3190/files/recyclerview_custom_adapter_androidhive.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_off000069c7.bin
9874b4933d9483275bdba7a340aa67f86a53f9e4c8354a69f9177e09a654df37
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 4716 bytes
font_01_sfnt_off000079bc.bin
aa29e37bc07d8ecdb3822de88b4c6e3222e4c2cd9d02a4f064cf759e0650f0e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x79BC 13776 bytes
font_02_sfnt_off0000a559.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA559 4324 bytes