Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a8064e81ba2d71…

MALICIOUS

PDF

44.1 KB Created: 2020-08-28 00:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd777aa63f4db871e3d5b5790390c815 SHA-1: ae702379443c55a7baac880d3d302c5f9c33a341 SHA-256: 83a8064e81ba2d71dfd80ae3994fff23a769d22df8a3db2ddd64703d237668d2
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=que+es+la+inercia+en+quimica', which is also flagged as a malicious redirector. This suggests the PDF is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

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.ru/pify?keyword=que+es+la+inercia+en+quimica In PDF document text
    • http://lefosotax.sportpic.co.il/uploads/1/3/0/8/130874050/4209694.pdfIn PDF document text
    • http://sefiz.triad-of-od.com/uploads/1/3/0/9/130969077/xosuji_zifafad_zupuruzemexux.pdfIn PDF document text
    • http://files.rabbijonathanshulman.com/uploads/1/3/1/4/131437380/fibuvibozejufaj-medalikiferemi-novubuzuniwo.pdfIn PDF document text
    • http://files.amsp.net/uploads/1/3/1/4/131483249/sipixafuviw_lozenu_kevefixino.pdfIn PDF document text
    • http://files.winchestercarpetoutlet.com/uploads/1/3/1/4/131453674/436309.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/1/0438/6275/3445/files/distinction_between_curriculum_and_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1891/0870/files/32735827066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/lomek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/vabugezasonigovamovos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/trauma_abdominal_2020_atls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/89652710982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/82473483409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/loroj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1361/0392/files/biphasic_sleep_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/12866556553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/preparing_to_be_a_godly_wife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/blokus_game_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/pezugevifeji.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 5132 bytes
SHA-256: 10f268a0003ea75003bab32bd3acf1af182f52dd48bb9c2d620e53e19eeb7409
font_01_sfnt_off00007da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA7 10980 bytes
SHA-256: 06d81564bfefdbe2a3be283d52960edf89ebfa243b893a152033d576b3088759