Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ca6e509fb7e454…

MALICIOUS

PDF

37.2 KB Created: 2020-07-15 05:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 352049d769700c6888d8894be1951ace SHA-1: c3ebe37dfbdc4dbaefd91b94e1fe78e0c1bd8a09 SHA-256: 79ca6e509fb7e454dd7f2837b0dcf4961ef0e8d01a642d0067fe3e59d51796c9
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector services like ttraff.com, disguised as a manual download. The ML classifier strongly indicates maliciousness, and the presence of redirector links suggests a phishing or scam attempt to lead users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wb?keyword=native%20instruments%20m32%20manual In PDF document text
    • http://files.mrizzo1964.com/uploads/1/3/0/9/130969600/d3f88a1c3.pdfIn PDF document text
    • http://files.borninabarnminiatures.com/uploads/1/3/1/1/131164157/d7f3daf101da380.pdfIn PDF document text
    • http://files.wlacgallegos.com/uploads/1/3/0/8/130874350/dogapozureni_magiraduw_wegifuwokaxafi_takuxeruwow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zomifedig.files.wordpress.com/2020/07/63885111664.pdfIn PDF document text
    • https://rurilaxun.files.wordpress.com/2020/07/1162211219.pdfIn PDF document text
    • https://vefevomite.files.wordpress.com/2020/06/66644256443.pdfIn PDF document text
    • https://garuwade.files.wordpress.com/2020/07/tadopojilosanebikoponix.pdfIn PDF document text
    • https://xejolaxutibu.files.wordpress.com/2020/07/45623108324.pdfIn PDF document text
    • https://nolomijavugi.files.wordpress.com/2020/07/bosutulizaxojebu.pdfIn PDF document text
    • https://nuxibigov.files.wordpress.com/2020/07/23398774985.pdfIn PDF document text
    • https://somurumamuge775260414.files.wordpress.com/2020/06/nuxofokamabagezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/xanuduzosivixavosisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/wixilutekedovibukimujudij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/nibumew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/68725166861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/tozizerazogadawazisesevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/45998102543.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5719 4928 bytes
SHA-256: c07bd0752eeeb4b3be3972815dfbdb2e8b38eb50f4fc55d88072bb59075d7512
font_01_sfnt_off000067b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B8 9412 bytes
SHA-256: 79a76b65e1f6aa265bad217ad5281cfc092150a26d0b89fc564cc434a079328a

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