Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e1e55734ce710b…

MALICIOUS

PDF

34.5 KB Created: 2020-09-06 04:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fc35d6dbf729246f72a7e523e7a9a2c SHA-1: 9c89fae6f704928732b0b9aaa78dd2f66ecdc55f SHA-256: f3e1e55734ce710b83a28a4761b297b2a5d38adf6df0fbde99c3e7eb6684f5ec
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a search result for 'manualidades para niños de preescolar pinterest'. This suggests a social engineering lure to trick users into clicking the malicious link, likely leading to further malware delivery or phishing. The file also contains a PDF link farm heuristic, indicating it hosts multiple external links.

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.link/wix?keyword=manualidades+para+ni%25C3%25B1os+de+preescolar+pinterest
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/solomon_asch_conformity_experiment_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1738/files/corel_painter_2016_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/les_propheties_book_english.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b2b338978544c079b0d69c166f3ebbb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/laporan_pendahuluan_subarachnoid_hemorrhage.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/74758986.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/bypass_megasync_limit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/65058046529.pdf
    • https://cdn.shopify.com/s/files/1/0437/2974/8117/files/82091212864.pdf
    • https://cdn.shopify.com/s/files/1/0446/9538/8313/files/rapport_de_stage_sur_le_rapprochement_bancaire.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/japan_tourist_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/jbl_speaker_charge_3_manual.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_off00004866.bin
11f57fadaae31c90619df5e3d31009dc83ee986f64f093e74c61923ef1f249b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4866 5284 bytes
font_01_sfnt_off00005a35.bin
6086fe7989650cc73a5bb5b9b2e83f6c47832bcf189cbc6620c5f3629b7602b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A35 9944 bytes

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