Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ea533d722933a8…

MALICIOUS

PDF

40.7 KB Created: 2020-08-26 07:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b29b59103d2b112f5be03f4f36b4bbc7 SHA-1: 12696f8910f69ad80305f72f32d96b2b2b76706b SHA-256: 01ea533d722933a8fed8dc251e143ac5a014daa2954b6186bcca10c642922a24
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=pearson+algebra+1+common+core+pdf
    • http://files.vca1988.org/uploads/1/3/1/6/131637016/zesegisuzojibiguna.pdf
    • http://files.carolinescandlecompany.com/uploads/1/3/0/7/130740438/7478165.pdf
    • http://files.harlanhawkband.org/uploads/1/3/1/4/131406390/fatuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/seven_leaf_clover_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/34907691445.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/1829108587.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/medical_nutrition_therapy_a_case_study_approach_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/63841188427.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/griffon_corporation_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/anandpur_sahib_resolution_in_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/lofegugegedumixujuzedo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/tuwuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/diablo_2_javazon_build.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/57653647584.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8182/files/27388451065.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/69659081208.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_off00005ab8.bin
9d6cfea5b55c63a24d125619fc421c31fe3d40ff449207b659ebb9a085018059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB8 5668 bytes
font_01_sfnt_off00006deb.bin
4e80804decfc05dd98df3b648ac5e3c15a03e7a4f27de93b9482e0119d36d6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEB 12548 bytes

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