Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df9526b42a88b84…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 07:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97d759a7e4c6eacea2621b452f635f4c SHA-1: 46da4cc2ee633062b3e2ce65030645e0bcb4d3f2 SHA-256: 5df9526b42a88b84487e6878cb7deb6e01def0fd628a3530dac721f3ff7de755
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary link, 'https://ttraff.cc/pify?keyword=read+and+highlight+pdf+on+ipad', suggests a lure to trick users into clicking. The presence of many external PDF links also indicates a link farm, likely to improve SEO for malicious content or to distribute further payloads. No scripts were extracted, but the link farm and redirector strongly suggest a phishing or malware distribution attempt.

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.cc/pify?keyword=read+and+highlight+pdf+on+ipad
    • http://files.oto-saigon.com/uploads/1/3/1/6/131637016/livimi-vawapaxaxuko-zibalafe.pdf
    • http://files.phoenixvillexc.com/uploads/1/3/0/7/130738984/8c27c850d2.pdf
    • http://files.karmaroadgettingofftheroundabout.com/uploads/1/3/1/4/131437246/644d7f50409.pdf
    • http://files.tamwesley.com/uploads/1/3/0/9/130969225/1294270.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/losuvelelisujufex.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/alphanumeric_series_for_ibps_po.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/tutoxexodup.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/vanilla_wow_mage_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/chemistry_notes_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/sodenajejogakolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/python_list_find.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/figopukafonofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/93720032112.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/93921808838.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/tamokukamipuxetane.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/11112588333.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_off0000656a.bin
5e7069b34998e9a37e82143bddde7a60547fca247a95fa1d98f88bd4ab933123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 5036 bytes
font_01_sfnt_off00007697.bin
94d04dfc94486fa19e2e27c7f127723e6dd4c4892e613e5da2bc6e092f451d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7697 9560 bytes

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