Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0354c1481666666…

MALICIOUS

PDF

53.0 KB Created: 2020-10-30 15:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bc24afe5278a349532187b8b81c7f5dd SHA-1: 33c18a1b642473c5b2d9e3c9ebcfef1ccb2b89cc SHA-256: c0354c14816666660b1338c7ee911d80fb774fe730d3e382204ecf1c46f385c3
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to redirector infrastructure known to host malicious content. The primary redirector URL, 'https://cctraff.ru/123?keyword=lee+ann+mcadoo+wikipedia', is flagged as malicious. The document also features a large number of links to PDFs hosted on Weebly and Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the embedded links are sufficient to indicate a malicious intent.

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://cctraff.ru/123?keyword=lee+ann+mcadoo+wikipedia In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/4557705.pdfIn PDF document text
    • https://sobegivi.weebly.com/uploads/1/3/4/3/134311910/fodukuxilakefu.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/gavod.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/bosajewowoj_rubuvakun.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/892442.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/1150995.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/gomiriw_niredulobup_zulagatu_denazejokumuxor.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/3502486.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/4084745.pdfIn PDF document text
    • https://gowubezu.weebly.com/uploads/1/3/4/4/134497845/jenusokekuramulowon.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/1/0499/2729/1048/files/faxapavuwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2705/6808/files/14652168929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/xudanunisew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/risabuvepabosowolimawul.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7898 5008 bytes
SHA-256: 27df8714ff948b376f48b3c5e228d62e2a7f9673422d2eb991c3c3740fa287fc
font_01_sfnt_off000089aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AA 11248 bytes
SHA-256: dcba994baf08395af5bb717aa90813d24997cbaaa22ad74223ea61af823e77e9
font_02_sfnt_off0000b022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB022 16692 bytes
SHA-256: b35266d776b8e4877457eafabcb27c6cc887dcb134258da853663e77bc13adf1

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