Malicious PDF — malware analysis report

Static analysis result for SHA-256 e536dc9a967b3086…

MALICIOUS

PDF

54.1 KB Created: 2020-08-06 10:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57350d983a983ddea9b5dd41d3d0f56e SHA-1: 2cbd571fe5345ecc557bbb37cf6f0804e394a171 SHA-256: e536dc9a967b30869455fa198111b3255c6dc4ee6dc3e6a1e4c9c46b3b53e66c
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'calisthenics exercises chart pdf' and includes the malicious URL. This indicates a phishing attempt designed to redirect users to potentially harmful 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.cc/pify?keyword=calisthenics+exercises+chart+pdf In PDF document text
    • http://files.wingsofhopemankato.com/uploads/1/3/1/6/131636941/zizab.pdfIn PDF document text
    • http://jududozo.auroraleatherware.com/uploads/1/3/0/7/130739678/f1061e.pdfIn PDF document text
    • http://files.gitxsansimalgyax.com/uploads/1/3/0/7/130775245/dijanebi.pdfIn PDF document text
    • http://files.11pluscolchester.com/uploads/1/3/0/8/130873921/be1d40cc.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/1/0440/7197/7110/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/joburajenila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/25881483663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/16465145636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3139/6503/files/factorio_red_circuit_blueprint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/62903338530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/31564202620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/81911916805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3967/8886/files/telakifaxenijonoluzabuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/30943454662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/87947073982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/vazafolebolatakogunozure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/35807816553.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 5216 bytes
SHA-256: b57ecfa2945436bbc417ef8ebcd50b5ce057f0ab5844a0718a23dd2358159d40
font_01_sfnt_off00008983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00009211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9211 10128 bytes
SHA-256: caddd3ceadd3dc0ad7b58eb0debd425d72787381a06e057ef1194dbca17c9ade
font_03_sfnt_off0000b4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FD 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660