Malicious PDF — malware analysis report

Static analysis result for SHA-256 df547a0613b64dcb…

MALICIOUS

PDF

41.2 KB Created: 2020-08-12 06:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f5373bab58c63b1cd1a3df9a78f3d30 SHA-1: 2478007cea358f1ea6db07c7de423873baf87b35 SHA-256: df547a0613b64dcbe560ae4bb43c70efc78b4b584c5f78ae70ff2be01a92d00c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'centrifugal compressor maintenance pdf' and a URL pointing to a redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to attract search engine traffic and lead users to malicious destinations.

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/wb?keyword=centrifugal%20compressor%20maintenance%20pdf In PDF document text
    • http://files.janetcrowcst.com/uploads/1/3/1/4/131438234/kituwixab_fepitod.pdfIn PDF document text
    • http://files.lechowskislab.com/uploads/1/3/2/6/132683088/wevexep.pdfIn PDF document text
    • http://files.robertjschneider.com/uploads/1/3/1/6/131637714/b9d6f891.pdfIn PDF document text
    • http://files.riverroadflowers.com/uploads/1/3/0/8/130874482/bibufak.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/1/0435/1596/9688/files/gaxegizelurilotoneze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0871/9005/files/18520144171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/bhabani_bhattacharya_a_moment_of_eternity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/breath_of_the_wild_expanded_edition_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/usmle_step_3_first_aid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/zumejusowow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/9495403439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/timozibanogesasemorufuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7916/8153/files/certified_ethical_hacker_foundation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/77749438450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2158/5831/files/adverb_of_manner_worksheet.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 2

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_off00006283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5380 bytes
SHA-256: e0ddd7ffc314a5c4b4ea9ebdcbe352f63b24dc5c9448816e7dbb50b79534e22c
font_01_sfnt_off000074ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 10240 bytes
SHA-256: a2ed73392c67143ca72888e84203bf908f08c5cceab178503f1c66749eb3eeea

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