Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b668f396be8c283…

MALICIOUS

PDF

48.7 KB Created: 2020-08-16 19:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07242a651fd369ddc6eda20d44d39072 SHA-1: bfed73bfd53250a484f6e898d01ff8b5c2652338 SHA-256: 8b668f396be8c283d478abca1debf0d861bbb071e30a3038106149b52e84ab31
234 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a significant number of external links, many pointing to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=phpspreadsheet+without+installation, which is likely used to funnel victims to further malicious content. The document body contains obfuscated text and embedded URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/pify?keyword=phpspreadsheet+without+installation In PDF document text
    • http://files.mackeiganmarketing.com/uploads/1/3/1/4/131452732/sodopafesub.pdfIn PDF document text
    • http://files.genestewartrealestate.com/uploads/1/3/1/4/131482941/3491343.pdfIn PDF document text
    • http://buluju.celestecollegeofintuitivemassage.com/uploads/1/3/1/4/131438282/vefuvawuk.pdfIn PDF document text
    • http://files.bbcvbs.com/uploads/1/3/1/4/131437276/3592750.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/1/0427/7207/0556/files/65909017885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/49006140889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3792/5281/files/tree_patches_rs3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/5803131976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/normalizacion_de_base_de_datos_ejemplos_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/larokadujamebajabuvenero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9055/9655/files/xafufetamasopofirafop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/autocad_2020_tutorial_3d_modeling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/best_ayurvedic_books_in_bengali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/fokabiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7696/0924/files/25336830758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0338/3708/files/zozadutesisoxitekebi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000778d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778D 5140 bytes
SHA-256: e8df47c4a4cae2d61cf9a6e658e64a95445b19c4394546f58ff602b3bd65a90a
font_01_sfnt_off00008908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8908 14184 bytes
SHA-256: 9a2d3934aff9331104baba55afa52ea7245fcbb4fa16b2764d10feeee6b04be7