Malicious PDF — malware analysis report

Static analysis result for SHA-256 4383d5f9ae0d617e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 13:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 979bd011934e138310fd93c292a54c78 SHA-1: 1d4e5c892637872bd6e812a9e673e86fdba28bf9 SHA-256: 4383d5f9ae0d617ebfe42f01b54cc1ca56e6e73e3dbfdb4b3369ab571059ad8e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a malicious redirector link disguised as a search result for 'nfl schedule week 7 pdf'. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the ttraff.ru URL, which is likely used to redirect the user to a further malicious destination. The document also contains a large number of links to other PDFs hosted on Shopify, which is a common tactic for SEO poisoning to improve search engine rankings for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=nfl+schedule+week+7+pdf
    • http://files.ccdadobooks.com/uploads/1/3/1/6/131606011/solasusilemunago.pdf
    • http://files.epistemologyontologyfoundationinstitute.org/uploads/1/3/1/8/131858661/7520310.pdf
    • http://degufunuw.irr-f.org/uploads/1/3/2/7/132710621/lojobufopijebi.pdf
    • http://files.dustinnowlin.com/uploads/1/3/1/6/131637553/nozuj-zulitoropude-zodegatez-jizavilegomibef.pdf
    • http://losir.newlifenaturalhealth.com/uploads/1/3/1/6/131606617/pugodasugozaxud_gozepexifuwas_dusofej.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/griffiths_quantum_mechanics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/xutagapuladuvipiful.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/uniqueness_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0454/3384/7966/files/plan_de_austeridad_republicana.pdf
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/37239320701.pdf
    • https://cdn.shopify.com/s/files/1/0438/9027/8568/files/kokibezitumer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/72919555494.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/palgrave_atlas_of_byzantine_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/4834537920.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/dovuroxewakomefe.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_off00007063.bin
4746b74340a47d5a909dc54c0962aaa214c9edf9613ca572d0a6868c2e6abd2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5144 bytes
font_01_sfnt_off00008201.bin
ca021db64b00cdc8abe43f486f8b127f5eead5dd0c502d82a0fc299dd80b2851
pdf-font-stream PDF embedded font (sfnt) at offset 0x8201 10452 bytes