Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd09133e60f55c3…

MALICIOUS

PDF

49.5 KB Created: 2020-08-23 12:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0ae1e12f8522bfbd94f7bc7b02d2a5 SHA-1: 88a23dbf1a7098a0425f196d0eb8ffb74f1ecd21 SHA-256: 1bd09133e60f55c3e49863488442b57f36ba8e08e125c83c9c02504b54e94e03
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=smartsheet+project+management+tutorial'. Another heuristic indicates a link farm, with a high number of generated PDF links pointing to external resources, including 'https://cdn.shopify.com/s/files/1/0429/2139/4343/files/vopegolizimeripovatuse.pdf'. The presence of a visual download button lure further supports the malicious intent of directing users to external, potentially harmful content.

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=smartsheet+project+management+tutorial
    • http://files.carolnack.net/uploads/1/3/2/8/132814906/vitowujivudalofa.pdf
    • http://files.wfbistro.com/uploads/1/3/1/4/131454670/5382485.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/vopegolizimeripovatuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/advanced_port_scanner_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/minecraft_0._13_0_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/gegudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/97634086027.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/wafibukoxotusulewitagexef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/chem_trend_safety_data_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/makeribe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/dialed_in_pinball_rule_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/79436651054.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007baa.bin
a57c96289f4956d8c261d0807175c0fbfb0b977ae4dd2abfd495802894897da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAA 5528 bytes
font_01_sfnt_off00008e4b.bin
113d170f6771e440985aa477e43c56d204e59550047e94968ec43f2df88231e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4B 13724 bytes

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