Malicious PDF — malware analysis report

Static analysis result for SHA-256 64adcda2a374a30a…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 01:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d08da8ff6f08b18dffa3a5a5b7bea40 SHA-1: bb156a6995070db503f1679a020dc6d423e897e1 SHA-256: 64adcda2a374a30ac551d7625cb689b70469d2eb9fec1ded71a6e2603204c3c8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a document converter, aiming to trick users into clicking it. The document body and heuristics indicate a lure for users seeking to edit PDF files. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=converter+pdf+to+word+document+which+is+editable
    • http://files.midwestecheer.com/uploads/1/3/2/6/132681316/fifabedomedagowet.pdf
    • http://files.samifong.com/uploads/1/3/1/8/131872055/218905f.pdf
    • http://files.mthopesanctuary.org/uploads/1/3/1/4/131453818/bb82da08b6e1.pdf
    • http://files.atonementdenver.org/uploads/1/3/1/3/131382330/54184682d4.pdf
    • http://files.bcreativedesignandservices.com/uploads/1/3/0/9/130969568/2703368.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/cell_phone_addiction_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/tefusebidopifodal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/95479478874.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2245/files/mirizomuti.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/7146598817.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/xuwufetanowemawuzeni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/beloromawodosuxaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/7582165640.pdf
    • https://cdn.shopify.com/s/files/1/0434/1861/5975/files/virtual_dj_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/37907494263.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2581/files/abu_dhabi_commercial_bank_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/fagonitafebudig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/sakuvujodipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/96031684772.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e8.bin
ece8e8d7b3778965f1479134d73f8a1cad78f59c88b8a2e8a520ee4c5c3adf8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 5592 bytes
font_01_sfnt_off000073d1.bin
62fa05f23455ffe7c4a8efcc79898a3eebb6a586d3b7f27db9d621402fad72a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 10260 bytes

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