Malicious PDF — malware analysis report

Static analysis result for SHA-256 be73333508da578c…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 13:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0446b32a50df26c542d68303f571a50 SHA-1: 2d82f567cd673f30592aa90e6ae3bd663a7bac83 SHA-256: be73333508da578cef9dd54ef6887f79d52f54383b656c445c80ab79ea6bba24
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a malicious redirector, disguised as news content. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or phishing pages. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics, indicating the primary lure.

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=oregon+ducks+football+news+bleacher+report In PDF document text
    • http://ludaxig.blockislandhoney.com/uploads/1/3/0/8/130813765/de719cdc00d60f6.pdfIn PDF document text
    • http://kopubu.eatrighttidewater.net/uploads/1/3/2/6/132682878/a0af8caea119fc0.pdfIn PDF document text
    • http://sexileb.armillerdesign.com/uploads/1/3/0/7/130738943/c434ea1d19827.pdfIn PDF document text
    • http://gevuga.annayeroshenko.com/uploads/1/3/0/8/130813747/7187198.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/1/0434/0455/8488/files/after_effects_keyboard_shortcuts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/11029756775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6975/8874/files/solomon_islands_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4084/9575/files/19162431242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/ch_3_science_class_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4026/0505/files/azure_app_service_editor_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/povexavudasomotek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/bcci_bank_scandal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/27308305734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/43345797563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/7835538692.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620E 6568 bytes
SHA-256: 792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5
font_01_sfnt_off0000725b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725B 5740 bytes
SHA-256: 3517f0cf81f2555ceeeddef8caa989d99ccb7eb3ca00e33f02dfa602f8409c15
font_02_sfnt_off000085e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 2144 bytes
SHA-256: 279c37fcabba51aac6d2da334e904db04caff73ea0fe0e33b42da9ccacbeb2f2
font_03_sfnt_off00008fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 10228 bytes
SHA-256: 30f35ade60f582080637b96eab15e2d4312765a94ffca131bca4a449fc67cbea