Malicious PDF — malware analysis report

Static analysis result for SHA-256 617692f3e5d64caa…

MALICIOUS

PDF

85.7 KB Created: 2020-08-05 23:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ec0800f769ef5a71f7f9619d0c6aac8 SHA-1: 9142a10f918a6d2af338c15fe875f63a978c9aa5 SHA-256: 617692f3e5d64caa442d58d9b528582141484fcb26618c2ad9b9e33c30b7ef54
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that masquerades as a search result for a PDF document. This link points to 'ttraff.com', which is known for redirecting to malicious infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely as part of a link farm to improve SEO for malicious content. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a phishing or scam 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=download+tulisan+asmaul+husna+pdf
    • http://files.shenangofire.com/uploads/1/3/0/7/130739309/viviwilesexeja-zaxaziroxak-wobupetig.pdf
    • http://files.windhorseadvancedhealing.com/uploads/1/3/1/4/131437657/1108938.pdf
    • http://files.tracysteinbrookpaintings.com/uploads/1/3/2/7/132740270/zawijib-kowabazovibumeg.pdf
    • http://files.biosciencepharmaceuticals.com/uploads/1/3/2/7/132710592/fizuxofar.pdf
    • http://jamolijom.hdofficiants.com/uploads/1/3/1/4/131408738/sosaje_natodowinufif_sikumurupadibi_zezanazisi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0432/5097/4888/files/family_loan_agreement_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/mufufenenene.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/vipijekepifiwote.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/47409384798.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/environmental_biotechnology_principles_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/rijodorowuwodoxaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/39948766658.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8489/files/54295604208.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25006313747.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011339.bin
4afe56ea35c4cbd29e92566893a91da2493a75c670ed5e66b027b42e4c2b6aea		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11339 30464 bytes
font_00_sfnt_off0000ded6.bin
47482db53ee1050f10ae2f5fdb374e6266df61916bd1d38339116c6d41b983d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 5276 bytes
font_01_sfnt_off0000f0c1.bin
dd7e00c68473e1e46eb1374fc82e6988c8ab99feacddbc575e63658d6959e415		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 10068 bytes

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