Malicious PDF — malware analysis report

Static analysis result for SHA-256 823c299c4f75e12b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 11:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2b6ed6614d29c5e6db1ea71acc28af0 SHA-1: 369901d64e8e4ca65072c400a5318aeb1b0da4bc SHA-256: 823c299c4f75e12b187ba5521a0534a4e546219d2c32d30bf0108265e798c061
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector to known malicious infrastructure. The document body, though obfuscated, contains a URL that matches the redirector heuristic. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or to download further payloads.

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=answered+on+another+device+means In PDF document text
    • http://wevuzor.futurefitness4allofyou.com/uploads/1/3/1/4/131454165/sejogunekizema_bosepi.pdfIn PDF document text
    • http://files.mywonderowl.com/uploads/1/3/1/0/131071289/8585379.pdfIn PDF document text
    • http://files.broadwaysilkens.com/uploads/1/3/0/8/130813834/3164757.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/1/0429/5720/9753/files/ffxiv_blacksmith_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/short_and_long_term_memory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6260/6489/files/dewalt_dw682_plate_joiner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/pdf_of_biochemistry_by_lehninger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/syndicate_emblem_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/95518842665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/vonijazagiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/fusaxafajemotuwosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/missing_alphabets_worksheets_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/60774647968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5583/2471/files/11855084515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/grade_2_math_review_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/slow_dance_adventure_time.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_off00006403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5288 bytes
SHA-256: 66d19c0252cfabc8b2494aa7c1070ee7d44d0e25984bbd25fb3359d8f1416b31
font_01_sfnt_off000075e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 10112 bytes
SHA-256: b7912fde56eff4b56968989dbae9f53e2363a7661fe593329cf8bca7d61c85e7

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