Malicious PDF — malware analysis report

Static analysis result for SHA-256 4325605293546ec3…

MALICIOUS

PDF

47.3 KB Created: 2020-08-09 12:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d6402c2169eaa1c7f1fabd0bbe6664 SHA-1: 2bbf0220b895a896fa7d0341338718f2d74e92f4 SHA-256: 4325605293546ec3a1f267e265e178160295f73990b46592eb7ad3b4ab13e157
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'PDF converter for macbook pro' and also hosts a large number of external PDF links, likely for SEO manipulation or to obscure malicious intent. The primary malicious URL identified is https://ttraff.ru/pify?keyword=pdf+converter+for+macbook+pro, which is flagged as a known malicious redirector. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=pdf+converter+for+macbook+pro
    • http://files.dunnvillechristianschool.ca/uploads/1/3/1/4/131452783/gevajilizok-pajotenanop-zasedapeg-gunowadixo.pdf
    • http://woxavemop.nattyseats.com/uploads/1/3/1/8/131856158/ribuza-jimupakodubis-soveboveduzote.pdf
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdf
    • http://files.yael-levy.com/uploads/1/3/1/3/131380083/9120446.pdf
    • http://files.finethings4u.co.uk/uploads/1/3/1/4/131483149/71fa521e2.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/maladies_de_l_appareil_urinaire.pdf
    • https://cdn.shopify.com/s/files/1/0448/2826/2560/files/small_steps_louis_sachar.pdf
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/65458307388.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/like_gecko_ios.pdf
    • https://cdn.shopify.com/s/files/1/0434/0177/3212/files/jugejizuwusesujonuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/6889/0015/files/fegemufig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/11172482129.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9741/files/ffxiv_house_buying_bot.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/sepasexikawezam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/tevogabimitekota.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/iron_carbon_equilibrium_diagram_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/nunagidobabemikel.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/61597376761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.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_off00007b03.bin
6bfa01ab6eb407df3e0a0af93d42219274643802ac658c919d69272a53eb03a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 5356 bytes
font_01_sfnt_off00008d2c.bin
9400817eba7686d671589cce4e355c9b800a57c8c1276001b267bb90bcb09340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2C 10196 bytes

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