Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe15a164739ee2aa…

MALICIOUS

PDF

47.7 KB Created: 2020-08-07 15:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c7bd1f7ffa1c823597ad8c82330ac7f SHA-1: 3335f7eae3da39e341c0011801971eb6fb06bb67 SHA-256: fe15a164739ee2aae56497ac973d09c10c9b7b2d31796a62e97412f77adde6f1
128 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=differential+calculus+bsc+1st+year+pdf', suggesting a lure to download further content or redirect to a malicious site. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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.com/pify?keyword=differential+calculus+bsc+1st+year+pdf
    • http://files.pcrconference.org/uploads/1/3/0/7/130738971/8877512.pdf
    • http://files.irvinedodream.org/uploads/1/3/1/6/131637218/jelemuwakifev-pukozuledasose-novibuvob-wetix.pdf
    • http://joveg.wppsfete.com.au/uploads/1/3/2/6/132681670/luzarifoxaxibixobe.pdf
    • http://files.cliffgloverpottery.com/uploads/1/3/2/6/132681409/wonazaf.pdf
    • http://files.esprit-de-core.com/uploads/1/3/1/6/131606201/5181262.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/59478851435.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/bupukaromexizalumeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/1156057472.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/55995970171.pdf
    • https://cdn.shopify.com/s/files/1/0429/6507/4086/files/vujufigekugisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0133/files/populavikagiziwawomiwizus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/rate_increase_letter.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/zurusuzisowobugun.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/91090683018.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/buget.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/bedupefora.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/jorasidogeforu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/33783484789.pdf
    • https://cdn.shopify.com/s/files/1/0434/3185/4247/files/10163937508.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_off00006631.bin
7bd277a7f73a9f57825b0f0db8b645cb473ac1fb8f99a8cdff988cdc282f8639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 5440 bytes
font_01_sfnt_off000078d1.bin
38f4e5d04625fb8b48d9ad37e2446180d3225abc1bfa18d3734b379e0d3120c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D1 10224 bytes
font_02_sfnt_off00009bea.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEA 16144 bytes

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