Malicious PDF — malware analysis report

Static analysis result for SHA-256 5848d6238a0bff2c…

MALICIOUS

PDF

48.4 KB Created: 2020-08-14 06:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df068bcc5e1a9c886c204da2918311cb SHA-1: f49709f12deb7934d9e7304b3326ef07a363f764 SHA-256: 5848d6238a0bff2cdaa4883ced6a0507d47f69d7ad92a651d3b1fd156838101f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. The overall pattern indicates a phishing attempt designed to redirect users to malicious content.

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.com/pify?keyword=games+live+wallpaper+for+android
    • http://files.kmrandallauthor.com/uploads/1/3/1/4/131407278/2982480.pdf
    • http://files.ethics-based-on-science.com/uploads/1/3/1/4/131438055/dafijatigepo_dolurulelana_lexek.pdf
    • http://rarip.mammioux.org/uploads/1/3/0/8/130874633/ziputanaba.pdf
    • http://files.sarnetfl.com/uploads/1/3/2/7/132740375/eeecd2ac200fc.pdf
    • http://rarip.mammioux.org/uploads/1/3/0/8/130874633/zip
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/xekamuzojunapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/37164125948.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/84361747230.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/bro_code_barney_stinson_francais.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/patewamunawurebarakiwebam.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/jumesadinuxobijujinazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/67477905621.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/rizerizamivobefilasomat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/bescherelle_grammaire_francais.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/28050525469.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/sams_photofact.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/bimapiwipudezedaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/37420211457.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/43547861604.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_off00007faa.bin
7082aaff0f0215104443ecc748739db2162f3a2e8741b30af419c17f1f1721a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAA 5372 bytes
font_01_sfnt_off000091f9.bin
042650cabacd7fff7d2a1f92e409e744da8c3b77df308687ee993647ae80babb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F9 10016 bytes

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