Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eb0d638bf6089d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-10 05:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b82e2b59830850a9223572e9aae019fc SHA-1: 11d3660ec764194917a02ccabaf6bb7c370eaedd SHA-256: 17eb0d638bf6089d3544227f7a0659505745e77c10432fde851372dd59f82748
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.ru/pify?keyword=cuore+nero+amabile+giusti+pdf
    • http://refifo.gnslasvegas.org/uploads/1/3/1/4/131408027/pukuleroxinawi-ditomemukakozer-dugibelisemuve-boxufolud.pdf
    • http://files.clairedaviselite.com/uploads/1/3/2/7/132712127/ec7590acf0f5f6.pdf
    • http://zuwof.laosyogaretreats.com/uploads/1/3/1/0/131071164/5868658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/velefijumer.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/51859464253.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/zirexeribewajimodima.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3059/files/archeology_merit_badge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/neveguvesufof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/english_learning_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/6473766298.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/xobiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/ximotafesunoxuxubuxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5808/3480/files/kokitovitimuzafuzowemub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/zevokugajozawavej.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/javafx_tic_tac_toe.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_off00006a17.bin
b3e6d3855fb3595cce07a4c538fc01f8a0c91e6a45507b9771c5a354b5a68576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A17 5404 bytes
font_01_sfnt_off00007c55.bin
83fb70e30d5a12ed510c606002f623c5a338e0594081df14eadeeb4a7fa3e880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C55 10936 bytes

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