Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fe5defb20d6382…

MALICIOUS

PDF

49.9 KB Created: 2020-08-02 18:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2e2090b02e35bbe3c4a6bdf76aea219 SHA-1: b9a9ec1ac7965d18a4909f0459e8d0c31503066c SHA-256: 33fe5defb20d6382aa7ead06e9d5a55ed9c0fd161a4dd4f9e82cc4cba12da675
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure promising a VMware Fusion license key, which redirects to a malicious URL. The document also hosts a large number of links to other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the embedded link to ttraff.com is a known malicious redirector.

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=vmware+fusion+11+license+key
    • http://files.the-kitchenplace.com/uploads/1/3/0/9/130969772/3218306.pdf
    • http://files.megastone100.com/uploads/1/3/1/4/131408537/birumiloxis_sepilanonefop_nitolufedesovel.pdf
    • http://walofu.didintle.online/uploads/1/3/0/7/130776158/zisajuf-wuwuziludojob-liwad-kowufepi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/rorokunekepolovadilowam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/zutefamufeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/16792339183.pdf
    • https://cdn.shopify.com/s/files/1/0431/5122/9089/files/88009352372.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/98721508949.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/vixatabigelaromabuvuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0027/4845/files/jejivenamofoveridi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/41014851599.pdf
    • https://cdn.shopify.com/s/files/1/0451/3693/7125/files/free_printable_texas_bill_of_sale_form.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/vilobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/kipatefiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/lagidemuguzowepele.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fbe.bin
35c4ba533b91f9a2ea6b306f6b39e656c42019fd8e714da68ec78daf3fdf18f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBE 5104 bytes
font_01_sfnt_off00008119.bin
d3ffc9a478896ccf87c516bb5cd2070a2105e23c353f4c96ec792bd4854e744a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8119 13992 bytes
font_02_sfnt_off0000accc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACCC 4324 bytes

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