Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ecfd7e50f4bece…

MALICIOUS

PDF

45.9 KB Created: 2020-08-14 01:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb3f00ec0bb7b33b5056e7bd8bd63372 SHA-1: 52e554367d87e45e490c0df5e7d62eb7cde8d4a2 SHA-256: 65ecfd7e50f4bece2083ed04ff7ff04b4ca17bc41cde77c721dccb3f68e05ca2
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, specifically `https://ttraff.cc/pify?keyword=letter+sound+activity+sheet`, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of many PDF links, including 19 generated SEO links, indicates a link farm strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/pify?keyword=letter+sound+activity+sheet In PDF document text
    • http://files.michellevaske.com/uploads/1/3/1/3/131384468/e0a6ec.pdfIn PDF document text
    • http://files.ricklewisrealestate.com/uploads/1/3/0/7/130776478/50365a373be3e3.pdfIn PDF document text
    • http://files.morristem.com/uploads/1/3/1/4/131437822/121f8c28a8.pdfIn PDF document text
    • http://files.juniperdesignmn.com/uploads/1/3/1/4/131454106/741516b65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/carrabba_s_italian_grill_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4283/0496/files/brand_equity_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/armani_underwear_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8053/8529/files/54277398859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/batata_doce_beneficios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/because_the_beatles_partitura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/21752880856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/10222982085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/nopavatewuzigowakaxugojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/3630356261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/panchatantra_stories_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/62029203370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/33080625628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/sokoxasuvewini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/55316133016.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 5100 bytes
SHA-256: 1421d6d0f239b591f826c97781329db5f7877b42d1ae22cdc531f3291e79d917
font_01_sfnt_off00007db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB2 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00008642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 10368 bytes
SHA-256: 7f7e4e3dbd36dbc8995301cd7837991ab96fdf8f85cb6838dfe1b06056bbe42a