Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c50d10758482a1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 15:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9cf7c49645aa0e4722991eab21dd0f01 SHA-1: 03c4a8a90101133c87251c61d1c4a0c9173ac8c4 SHA-256: e5c50d10758482a1c0f7654a42500004ae801352451695d395493263edae0d7d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that are part of a link farm, with the primary link redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains text related to an 'aviation mechanic handbook' and the malicious URL, suggesting a lure to trick users into downloading a malicious file. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=aviation+mechanic+handbook+7th+edition+pdf In PDF document text
    • http://files.ashmariephotography.com/uploads/1/3/1/4/131453111/xafixunagegog_kuvidifu_jefup.pdfIn PDF document text
    • http://files.aquestforhealthandpeace.com/uploads/1/3/0/7/130775025/zabivuzizofage.pdfIn PDF document text
    • http://fager.bellviewwoodschildcare.com/uploads/1/3/2/6/132695663/bukaboxodila_tofamezi.pdfIn PDF document text
    • http://files.deniserodgersbooks.com/uploads/1/3/1/3/131398100/tixutubaluzo.pdfIn PDF document text
    • http://xaxipoda.lovingmyhouse.com/uploads/1/3/0/9/130969465/piputodegovefekilore.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/1/0436/1525/6738/files/darabowegexaxerawiliped.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3295/files/67173152320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5134/3269/files/livre_assemblage_bois.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/xokipufujivegil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/83864638524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/nawejifenuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/elona_gene_engineer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/49458499669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/96822510479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/the_arduino_starter_guide_by_kunwar_imran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1209/4109/files/tekulugogafaxeremijisar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/20622328785.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_off0000555f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555F 5208 bytes
SHA-256: 0a5931731b348e46232be6af910e53961885d9e2b2d0a109a5127edb3f85c4e5
font_01_sfnt_off000066f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 14456 bytes
SHA-256: b3fedd2509f3a173fc283386c58ddf7e32bd3e1156d3b58beb85c52c94c9759d
font_02_sfnt_off00009354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c