Malicious PDF — malware analysis report

Static analysis result for SHA-256 40410a0f7293f041…

MALICIOUS

PDF

39.0 KB Created: 2020-08-08 03:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea6744f956c56bed316b8b808a12f155 SHA-1: b841cd1e1c414ca1ef96f014b506c255b237bb00 SHA-256: 40410a0f7293f0410e045ae9147660ec8e448353084fc2d5f3b38223426c2f26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=wordly+wise+3000+book+7+test+pdf'. The document body, though heavily obfuscated, contains text fragments suggesting it is disguised as a 'wordly wise 3000 book 7 test pdf'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware delivery.

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=wordly+wise+3000+book+7+test+pdf
    • http://files.peckersnashville.com/uploads/1/3/2/6/132681501/9184868.pdf
    • http://files.fusionartgallery.net/uploads/1/3/0/7/130775063/4545451.pdf
    • http://files.cubabarbers.com/uploads/1/3/0/8/130874246/5f429c.pdf
    • http://files.kentvalleyfsc.org/uploads/1/3/1/4/131408103/20e3b08.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/boolean_algebra_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/20017216984.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/gabozitunuduforika.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/puxatabijofusonanakulukud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/konobuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/2001_honda_civic_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/73172649709.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/fesizodibikirizurok.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/62568415024.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/78014544708.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_off000059f4.bin
50a3d411841dae1f0f39232de72e8978a3a29f0dbd593d6a98d5593f2c695469
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F4 5620 bytes
font_01_sfnt_off00006d49.bin
8953790856a4842e32a7ba2420a5210bb104850672a5df8091c21937d443011e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D49 10036 bytes