Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e850508d0ad980…

MALICIOUS

PDF

45.7 KB Created: 2020-08-25 00:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 55f3ca5fcda8fb8e5788c7e87bdd9fdf SHA-1: 9f6174d869f510db5a427d64614501eb36db823e SHA-256: 99e850508d0ad980b154d86b183e21f3b4b5ad3c1b69619a85147673b3668519
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify?keyword=franchising+for+dummies+pdf. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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.ru/pify?keyword=franchising+for+dummies+pdf In PDF document text
    • http://files.stutteringacademy.com/uploads/1/3/0/8/130813524/7b6a8da14d8582.pdfIn PDF document text
    • http://files.thesearenotmygrandkids.com/uploads/1/3/1/3/131380213/fagudulosir.pdfIn PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdfIn PDF document text
    • http://files.iamhanqin.com/uploads/1/3/1/4/131437249/keridirugik_zeduteteju_xorukunu.pdfIn PDF document text
    • http://files.aquariumsalesandservice.com/uploads/1/3/0/7/130738871/zomevowapotipeketupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6413/4554/files/object_adjective_clauses_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0565/2637/files/52784434454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4335/4781/files/12094178441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/sinotruk_parts_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/15693190813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/tegosuvabovopix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/85855323092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0732/7904/files/wow_silk_bag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/zijedavelubitadamexep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/livro_aldeia_global.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6366/4794/files/begenaralusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/4mat_learning_styles.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_off0000634d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 5296 bytes
SHA-256: 9c2ddc5a61ab97e4e2d73a3c4e3efaae57374453c28a539d06e1ff37dbd7ed03
font_01_sfnt_off0000750e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 12140 bytes
SHA-256: 70bc242d276594177e47a882bde68d8ae57a91d932be02e83b74cf71816f2281
font_02_sfnt_off00009bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3