Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfdf46deca32cf3…

MALICIOUS

PDF

169.1 KB Created: 2020-08-09 01:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aafb02d622960bd6fe1d1609d86fe22 SHA-1: a47aab7d9d0d374d67572cde09649e00a807426f SHA-256: 3dfdf46deca32cf304ac7d89abb1b3b905f2b30a8f9ef92dd49222fc05d9370c
92 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, https://ttraff.com/pify?keyword=pdf+and+cdf+of+gaussian+distribution, is the primary indicator of compromise, likely serving as a lure for phishing or to download further malicious content. No scripts were extracted, but the PDF structure and the malicious URL are sufficient for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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=pdf+and+cdf+of+gaussian+distribution
    • http://files.thehealinghousemindfulness.org/uploads/1/3/1/3/131380469/4110862.pdf
    • http://rilom.maximwater.com/uploads/1/3/0/8/130814229/suzebo.pdf
    • http://files.trendytutusbylauren.com/uploads/1/3/0/7/130775971/vitizegobubixereg.pdf
    • http://files.topnotch-stitching.com/uploads/1/3/2/7/132711970/lenuziratopuroxu.pdf
    • http://files.ancienthistoryseminars.com/uploads/1/3/2/6/132681409/cd22c7.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/39055018237.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/91594727670.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4570/files/tovawef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/88905535864.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/multivariate_data_analysis_7th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/10423609252.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/ziwavemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/84621110270.pdf
    • https://cdn.shopify.com/s/files/1/0441/2211/2152/files/ontology_in_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022d48.bin
ff7fcc9e7074e39496ef94869c84555403892427dd707d81335e4997d5225d46
pdf-font-stream PDF embedded font (sfnt) at offset 0x22D48 5300 bytes
font_01_sfnt_off00023f5f.bin
0f58032bc9d78b55d71549f1d81d645e27ab268405179cc6f6c8c78f0c46bbac
pdf-font-stream PDF embedded font (sfnt) at offset 0x23F5F 20156 bytes
font_02_sfnt_off00027e74.bin
e38d802e680588c1adf68233d43e573b4503d72407ed3224e9c6405786f74db2
pdf-font-stream PDF embedded font (sfnt) at offset 0x27E74 16768 bytes