Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef93a28e7e5792b…

MALICIOUS

PDF

53.0 KB Created: 2020-08-09 15:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85957cf9ec0dca5cc96d2782c065113b SHA-1: 277a653a1e024500ff38c4bb0b977882a993351c SHA-256: 1ef93a28e7e5792bda2e8fa67179cade9a41c97b4b1feb966521756f86f2fa1c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=functions+maths+iit+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are to Shopify domains, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=functions+maths+iit+pdf In PDF document text
    • http://bopavefu.soecolumbia.com/uploads/1/3/0/9/130969352/nawowuxuwavip.pdfIn PDF document text
    • http://files.flower-junction.com/uploads/1/3/1/8/131871677/tumodefili-wogegapizebuk-fazofafijav.pdfIn PDF document text
    • http://files.caneriverchildren.org/uploads/1/3/0/7/130775484/mexan_lamixunesit_tujenunixo_runiwi.pdfIn PDF document text
    • http://files.christianlisker.com/uploads/1/3/1/4/131453870/5be2971.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/1/0427/9002/7430/files/guia_berlin_lonely_planet_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/voltage_regulator_using_zener_diode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/keposawemuzebiboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/jivak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/katowefesenibekuwezod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1427/3698/files/82090060342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/rf_to_fe_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/84252219046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/gafibizesawotizetedano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/gelojawujazudamevovinijog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/mibefalunepekomipi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000719b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 5224 bytes
SHA-256: 1383e017c2bbbad10d70f88fd53068c0356fbd3fea6ee0bb4defb2f4b4296058
font_01_sfnt_off00008346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 14336 bytes
SHA-256: ba5229fe5a7b3227235455a661e7405f44916391c5ad13f3bcaf394ace120684
font_02_sfnt_off0000b08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08B 16420 bytes
SHA-256: e8cb11c66b9da036f5046388ecc2467d4131a8070a5cdd0d583845b767b493fe