Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efa9e6e0b7a0b6f…

MALICIOUS

PDF

48.6 KB Created: 2020-07-17 04:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e7a68407fd68054895467bd1d5e492 SHA-1: c5409831da22de4069c9108af38a60be00b4e237 SHA-256: 6efa9e6e0b7a0b6f5bd85f6ea9613fa54a18e462051cd1eec46527591e451840
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. The primary embedded URL, 'https://ttraff.com/pify?keyword=sociolinguistics+journal+articles+pdf', is identified as a malicious redirector, indicating an attempt to lead the user to harmful content. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=sociolinguistics+journal+articles+pdf
    • http://files.beautyandbeyondphilippines.com/uploads/1/3/1/4/131410158/jemotajimug.pdf
    • http://files.oduboc.com/uploads/1/3/1/4/131453214/3b1aa5006.pdf
    • http://files.kanawhavalleychurch.org/uploads/1/3/1/4/131452989/sibepakore_wisaba_bidezitobe_ranenapudewuwu.pdf
    • http://files.gammaetaomegaaka.org/uploads/1/3/1/6/131636990/5608641.pdf
    • http://files.nanditabatheja.com/uploads/1/3/0/7/130739142/f6bf1c88a080ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/risuwaxovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/zumimisexojiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/63517780522.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/xelanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://gosijanasi.files.wordpress.com/2020/07/rakedikidamu.pdf
    • https://zisepata.files.wordpress.com/2020/07/56520895389.pdf
    • https://wufikeg.files.wordpress.com/2020/07/kajazod.pdf
    • https://juxotig.files.wordpress.com/2020/07/13198244164.pdf
    • https://suwazazi.files.wordpress.com/2020/06/97301505245.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/mimewewokaratu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/dubenigarupuwezepegeget.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/munuredix.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/46501344685.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/75597124393.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cea.bin
bdc9a43bf8427e301dcc71359f60f9c61d431074b425024aee514d867b83f6b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 5384 bytes
font_01_sfnt_off00008f39.bin
350e799e97a1937adf72fa48392104f099f4865f4a5f9ee22314dd7a3282a09d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F39 10940 bytes

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