Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ed82f25a54959b…

MALICIOUS

PDF

48.4 KB Created: 2020-08-19 00:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d18980da71880399b109b12f7d2b397 SHA-1: cea5dc876e8d6b2608342faf2d12ce78486dba89 SHA-256: c4ed82f25a54959b2f3e82d05e38b30de7935fec17bad7301ca485da2eaf9292
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=choices+mod+apk+2.+2.+1'. The document body also contains this URL and references 'Choices mod apk 2.2.1', suggesting a lure to download potentially malicious software. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking for malicious content.

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.ru/pify?keyword=choices+mod+apk+2.+2.+1
    • http://files.bethanystahl.com/uploads/1/3/1/6/131606349/72cb0.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/49632121177.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/6272606762.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0733/files/32051462187.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/piziwubopuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/8878/1219/files/yaseen_shareef_roman_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/51465263250.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/69836932100.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/vupejetozapirenavare.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/37346971398.pdf
    • https://cdn.shopify.com/s/files/1/0429/1480/7974/files/bogafiwevopusijoteno.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_off000069df.bin
e228425458895d32e7b66e5def3918aa4624fa8ca9819ea1f2b53487591c21a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5372 bytes
font_01_sfnt_off00007c0e.bin
019aab5f3742e4841379159e045eb0f0f694dfaaf6168e5c35f3ac34b7bf0bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0E 10260 bytes
font_02_sfnt_off00009f71.bin
0083aa439c0ef21c222410f34ea0161ebbcb9ba39d00d297478968b4de3932a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F71 16256 bytes

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