Malicious PDF — malware analysis report

Static analysis result for SHA-256 646a60dc8e940813…

MALICIOUS

PDF

44.6 KB Created: 2020-10-30 01:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 244fc92df71f633cda6393a11001510b SHA-1: 9ef3f52b96941d30a209691e63b2626ab1dc42be SHA-256: 646a60dc8e9408137e3def9259f630dc96feece52e8239d8adc7118ba278b71e
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ggtraff.ru. The document body, though heavily obfuscated, appears to contain text related to recipes, likely serving as a lure. The presence of multiple PDF links and a redirector link strongly suggests an attempt to drive traffic to malicious infrastructure.

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://ggtraff.ru/strik?keyword=tuna+and+eggs+recipes In PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/a00fdab68db6.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/jotebofizaverevulaw.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/nufonaruto_zavowefi_lirosedipatixes.pdfIn PDF document text
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/bipoxo-gimuwe.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/e26125be-4fe2-48ec-9b59-afcf0166541f/22068202579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9736/4926/files/tajexabedipozeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6295/8517/files/webuvileniduruku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916bf3e6-9709-4161-9216-44af1f74ff1a/pakexugeboririrutin.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/wixajiruzedi.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/aligarh_movement_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7718/2642/files/xiwujamenobawakimugupuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76406a81-5feb-4687-af43-39718de12bdc/xazowep.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/sefivix.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_off00006e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 5156 bytes
SHA-256: f219528db2fb325504c93d821336d32277d47302c34d5ecded05ca4d1e6dd6b1
font_01_sfnt_off00007ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 10896 bytes
SHA-256: 2dd21fa21b957228d87934d0b7e798eb2b39ddff34ea8edc0c806965cab81bbf

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