Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b9118cc7a1e9e0…

MALICIOUS

PDF

60.2 KB Created: 2020-08-19 16:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b37cb00ca3ba58daf9e6b7c9af1c97d SHA-1: 925abcfeb6781f357d8c7f91c1553f15916177ac SHA-256: 99b9118cc7a1e9e028f63e2c262945366edf54bdc0b888c01651224aa043e272
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=historia+liberalismo+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended destination. The presence of numerous links to seemingly legitimate PDFs hosted on Shopify suggests a link farm or SEO poisoning tactic to mask the malicious redirector.

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=historia+liberalismo+pdf In PDF document text
    • http://domejid.sergeypolstyanoy.com/uploads/1/3/0/7/130739433/9941281.pdfIn PDF document text
    • http://files.meridianstats.com/uploads/1/3/0/7/130776393/kijalubebes.pdfIn PDF document text
    • http://genoti.wickedladiesbeeco.com/uploads/1/3/2/7/132710494/pizokoxowuwugogefeki.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/1/0438/1114/3842/files/ambattur_industrial_estate_companies_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/teoria_del_bienestar_social.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/aneurisma_de_aorta_torcica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5175/1336/files/william_shakespeare_romeo_and_juliet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/19568992190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/arlington_ma_water_quality_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8140/0469/files/vajugunowebinanibebaradi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/sad_breakup_dp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/rozofoperuvigabogabirud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/2999570424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/al_quran_terjemahan_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/printable_letters_for_bulletin_board.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_off00009dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCE 4972 bytes
SHA-256: 1810f12aec3711cf69e8a576ee1fb81d6e604e3dce79dabc44432358b7d55ad7
font_01_sfnt_off0000aea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA8 11572 bytes
SHA-256: 87cb13ececd13c0a57ba8329cbc752b2cf1775292a4658bb6b77b123b9f53522
font_02_sfnt_off0000d43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230