Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28febc268d1681c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 12:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 432522896806e9c652f43b4951225f74 SHA-1: 815c44bf69f92243172ccd602d15f483e4427d5c SHA-256: a28febc268d1681c8dae99c10eb7232dfa3563093d7a86f7e0e804c5a543e47d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=autismo+e+asperger+pdf', is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. 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=autismo+e+asperger+pdf In PDF document text
    • http://vitago.nataliejimenez.com/uploads/1/3/1/0/131070420/dimavegigesu-vizimukax-ranavaror.pdfIn PDF document text
    • http://files.downingtownswimacademy.com/uploads/1/3/1/4/131453219/b58539fa67b0289.pdfIn PDF document text
    • http://kamuju.cdbua.com/uploads/1/3/2/8/132814930/xaregajure.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/1/0428/4104/7206/files/tewobopuduwidowage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/22959112928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5860/9819/files/36751451767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/vujenezisenoxadixejomus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/30302074981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/php_header_utf_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/25951960046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/greatest_showman_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/zul_farrak_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/how_to_convert_to_word_without_adobe_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/john_deere_gt275_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/33160880067.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 5320 bytes
SHA-256: 2fc4e63c3980cb4760074499429bc3de9b2e6420569fe3dd2946725f38664360
font_01_sfnt_off000078db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 10672 bytes
SHA-256: 503ed86e353971d5ac37f4f345bc5f0adc80d0923f6657170c7d88099698be84

Open this report in the interactive analyzer, or submit your own file for analysis.