Malicious PDF — malware analysis report

Static analysis result for SHA-256 1910b53135194768…

MALICIOUS

PDF

45.3 KB Created: 2020-08-20 14:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ada55b876f89f534c4e246f3c9e8b730 SHA-1: 46b23ba11a3a05bab44001d99799e7e06c97ea9f SHA-256: 1910b531351947683aac4874963bd90e3d4f8f19070f86d4f4b68120ca92f2e6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external links, including a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, references 'Chicago fire season 6 guide', likely a lure to entice users to click the embedded links. The embedded JavaScript and the nature of the links suggest an attempt to redirect users to malicious sites, potentially for further exploitation or phishing. The ML classifier strongly supports the malicious verdict.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=chicago+fire+season+6+guide
    • http://files.poweryogaflow.com/uploads/1/3/0/7/130739544/1208677.pdf
    • http://nudowokox.arcadianvacationrentals.com/uploads/1/3/0/9/130969352/kakim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/36027853364.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/clinical_cardiac_pacing_defibrillation_and_resynchronization_therapy_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/amphigorey_too.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0445/9646/1732/files/97801636860.pdf
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/love_is_like_oxygen_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/anestesia_epidural_em_caes.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/lazomabakejuxuvus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/40560744738.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f1.bin
df5052560dd714adf38652938d9def5a5c392207e604d6259c915efa4a348fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F1 5228 bytes
font_01_sfnt_off000078a4.bin
5e2dde4580253d55e1528afc3b9c420abf9da8ec248cce06bd14904d395bd9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A4 9884 bytes
font_02_sfnt_off00009a72.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A72 4324 bytes

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