Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c8eb265ed86904…

MALICIOUS

PDF

45.8 KB Created: 2020-07-15 21:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 6a6ccf9b110a8e890ab7b5cab4963bb3 SHA-1: b6761ba6a7f9ada930ba11ab6d5c9fe49a165d73 SHA-256: 94c8eb265ed869040d44fafad28e6741ec99dae8668eb82a427b43f707d021ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, designed to obscure the ultimate destination. One critical heuristic indicates a direct link to a known malicious redirector at ttraff.com. The document body, though partially corrupted, suggests a lure related to merging PDF files, which is a common tactic to trick users into clicking malicious links.

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=menggabungkan%20beberapa%20file%20pdf%20jadi%201 In PDF document text
    • http://files.stmonicasparish.com.au/uploads/1/3/0/7/130739462/kizusiditon.pdfIn PDF document text
    • http://files.linkuniforms.com/uploads/1/3/0/7/130738814/vozuxudezab_jamufipokojal.pdfIn PDF document text
    • http://files.lotusdirect.co.uk/uploads/1/3/1/4/131407565/ef8dd74ff3c.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/1/0432/0644/3163/files/nutotuvuruxutorevufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/84122074114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/kotaweveximiga.pdfIn PDF document text
    • https://xujonajodezo.files.wordpress.com/2020/06/59162880703.pdfIn PDF document text
    • https://miteduxom.files.wordpress.com/2020/06/7730527699.pdfIn PDF document text
    • https://sazexaki.files.wordpress.com/2020/06/38252963032.pdfIn PDF document text
    • https://tizakifu.files.wordpress.com/2020/06/51917856433.pdfIn PDF document text
    • https://talugunika.files.wordpress.com/2020/06/barafeseveboxapawunasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/tapirabidex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/41016092747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/29098664148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/59617133212.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
🗂 Part of campaign: dymondelise.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B9 5060 bytes
SHA-256: 6284408ad3345efb98dcc60428fb1f5a567ea780586af3708896ab562fb2b5ff
font_01_sfnt_off000088fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FE 9748 bytes
SHA-256: 75a3262806c5d57f531592571e7c1be9cbd95636ba6713b6eead7447c61b0efa