Malicious PDF — malware analysis report

Static analysis result for SHA-256 32af53c48c5c9b4f…

MALICIOUS

PDF

44.3 KB Created: 2020-08-13 22:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db3dc20a8b0b4e3c202c851f95e77219 SHA-1: 746ff4ff25f3caaa08d85d7f2423e9064b479fbd SHA-256: 32af53c48c5c9b4ffa6d551681f6140b5e62055ee2d524dced83fb3b1fc8dde2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com), while another noted a large external PDF link farm hosted on cdn.shopify.com. The document body contains obfuscated text and the primary URL, suggesting a lure to a potentially malicious site or a search engine optimization abuse tactic.

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=parches+de+alginato+de+calcio+pdf
    • http://files.thestompdown.com/uploads/1/3/1/4/131407051/fimizujox.pdf
    • http://fazozu.wilsonracingesports.co.uk/uploads/1/3/0/7/130775162/zipedivarufakigi.pdf
    • http://files.santadotfe.com/uploads/1/3/1/4/131453850/susixiderawafosiz.pdf
    • http://pabigujam.timgriffiths3d.com/uploads/1/3/1/0/131070146/wopudalowuziv-tofaruko-nofiderojujoj-jumirix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/xukex.pdf
    • https://cdn.shopify.com/s/files/1/0445/6851/0628/files/basic_english_words_used_in_daily_life.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/46245972449.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/amadeus_peter_shaffer_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/65074898317.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/application_of_laser_in_medicine_and_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/39226812317.pdf
    • https://cdn.shopify.com/s/files/1/0437/2096/6293/files/tapolexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/87407097695.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/bailey_and_love_latest_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/asme_bpvc_section_viii_division_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/low_cholesterol_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/41823544004.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_off00006983.bin
5ef28f434cd504f9aad107f3e39054985194f0345c9d1feaf15d4812353f5b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6983 5420 bytes
font_01_sfnt_off00007be1.bin
e866d3ae0df02d09e912375eb40368534aa84d6232fa74e089666505ec20f6fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE1 12648 bytes

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