Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa18c4d63d6d82…

MALICIOUS

PDF

49.7 KB Created: 2020-08-24 23:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8fb924588421df8bd89fd0985690f9b SHA-1: a200218396878a46904a5f8d28f9640b6a6872c7 SHA-256: adaa18c4d63d6d829a0aa1b39da57a40f2033054325146c785b6f6782c4d906f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to look like a manual for AutoCAD. This suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for 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.ru/pify?keyword=manual+autocad+2013+romana+pdf In PDF document text
    • http://files.kadencekreations.com/uploads/1/3/1/6/131637876/cd82605510b7e6.pdfIn PDF document text
    • http://files.sheiladavis.ca/uploads/1/3/1/3/131380308/mixubusinegafome.pdfIn PDF document text
    • http://files.region4convention.org/uploads/1/3/0/7/130776589/serejonekaw.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/1/0431/7950/7870/files/imo_file_location_in_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/kekiraseku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/83331887306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/cemu_botw_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/suvotowunulunexaxuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/4997953008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/1174/3400/files/77574110749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/38870954512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/88111900432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/vefejosogukokipinule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5066/2053/files/xujipavuzuravupepozaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/gaginazumajituk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/logesetukafefa.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_off0000760b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 5332 bytes
SHA-256: 92f71bba1bba517f292487c549561a149c7cc4b117e66b242a1d01a995eac5d3
font_01_sfnt_off00008815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8815 10360 bytes
SHA-256: 72ec356d14e6f71586a02113492a6339c4e793886c4c313739122f53ec8cb774
font_02_sfnt_off0000ab8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3