Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1077ad166335d5…

MALICIOUS

PDF

42.8 KB Created: 2020-10-20 22:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5e7c3c3f4f2ad7021868a293cc91364e SHA-1: 990e6234a8f9c25f3c17c0f0444239e4864cd70c SHA-256: 7f1077ad166335d5a7a8f4cbb8736da9cac0393c40af1846856f3636e01c405d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirector infrastructure, specifically `https://gettraff.ru/123?keyword=using+apkpure+app+free+download`. This URL is flagged as malicious and is presented as a lure for a 'free download'. The document body, though heavily obfuscated, also contains this URL, reinforcing the phishing attempt. The ML classifier strongly indicates maliciousness.

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://gettraff.ru/123?keyword=using+apkpure+app+free+download In PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/gadejuregidan.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/resadikopipuvu.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/gonisarogisabagudexo.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/rasoxusa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5128074d-4de9-4bac-bb0b-53a23fbd850b/georges_bataille_the_trial_of_gilles_de_rais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc97acf8-3a90-4cdc-a7a9-a06badc53619/liratesoboragufiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f828b04-cd24-482d-9381-99c4bd7fb424/pagibadogobapisawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f087d6-6585-43fb-a7ea-aa4c0a435d4a/.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vikumofabotugelub.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/96867361110.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/55319707386.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/kulenelawoxulipanipoworu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/jidiwalonikuxuposewutav.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/74022550814.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/nadejanarezobixuliser.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/teresixonibinimo.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/55665783161.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/vemetu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/63144760210.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_off0000686a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 5356 bytes
SHA-256: a41fb49113850c074c67a40edc5fff7fe5e1962c21f31c849446321fc3613541
font_01_sfnt_off00007ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 10216 bytes
SHA-256: 2356f49ebbacf99f4ba4a40ad0d514dbd357de8f3318e7a3adfa0d79bd42752e

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