Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d0caf8f80a1483…

MALICIOUS

PDF

34.9 KB Created: 2020-07-09 05:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f69549e055a8cb20f89bbddf9b21ed20 SHA-1: ea1819ce0f117b8ea318f8a35548c4c0ca97c4b7 SHA-256: f4d0caf8f80a1483720690ee0ec73813ec0deec0a38f74b67f207ecbba8b11ac
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links designed to appear as search engine optimized results for 'Husqvarna motorcycle service manual pdf'. The primary link redirects to a known malicious infrastructure at 'https://ttraff.cc/wb?keyword=husqvarna%20motorcycle%20service%20manual%20pdf'. This indicates a likely phishing or malware distribution attempt leveraging SEO poisoning tactics. No scripts were extracted from this sample.

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/wb?keyword=husqvarna%20motorcycle%20service%20manual%20pdf
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdf
    • http://files.sopoochtraining.com/uploads/1/3/2/8/132815961/kawivibugakovuj.pdf
    • http://files.beeffoundation.org/uploads/1/3/1/6/131637034/dadigaguxa.pdf
    • http://files.gsskids.org/uploads/1/3/0/8/130873973/korunavo.pdf
    • http://files.agsoba-na.org/uploads/1/3/1/4/131456012/nexejepeza-vapuzag-zixivefega-jemigimot.pdf
    • http://files.behappy-lifetransformation.com/uploads/1/3/1/6/131606631/guxakeg-tosijokiw-fezeni-seputojefubofox.pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • http://files.pblconnections.com/uploads/1/3/0/8/130813558/jedegubawik_mafapifobotofa_demawa.pdf
    • http://files.clearwatermusicserves.com/uploads/1/3/0/7/130739183/6ce1fb3d15650b1.pdf
    • http://files.michaleens.com/uploads/1/3/0/7/130739740/lemijolagafu.pdf
    • http://files.illinoisdelta.org/uploads/1/3/2/6/132681938/2186787.pdf
    • https://momuniwidap.files.wordpress.com/2020/06/bikuzijavefevetarer.pdf
    • https://rotibokagi.files.wordpress.com/2020/06/fuzizijusivurolik.pdf
    • https://dagozojefuxe446029911.files.wordpress.com/2020/07/43575191130.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.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_off00004ba1.bin
d4c8c320c35fd949985b96c408d0885144eead3f0f890f16e6219bb05f5fb975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA1 5432 bytes
font_01_sfnt_off00005e0a.bin
9488e4f3ad416d17a07a0161202b72fc9d30dd1b898821e61d7ef39dc167f98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0A 9732 bytes

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