Malicious PDF — malware analysis report

Static analysis result for SHA-256 6333be8ebf02b42e…

MALICIOUS

PDF

34.6 KB Created: 2020-09-09 22:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b688a856e1be589a050034bf910a188 SHA-1: 579abf160ecdffffc1f14ba8d95a477b87dffca9 SHA-256: 6333be8ebf02b42edd94973fa0eb4b5ee293a9f323e7b4f6b74c8bdcb36c065d
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to 'https://ttraff.club/wix?keyword=clicksafety+osha+10+answers', indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains references to 'clicksafety osha 10 answers' and multiple URLs, suggesting a lure to external content. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=clicksafety+osha+10+answers
    • http://lovul.lotusranch-homes.com/uploads/1/3/1/4/131454215/savupuvesun-jorunazan-muwamanija.pdf
    • http://bupapi.dud-bud.com/uploads/1/3/0/9/130969465/redubosoruvir.pdf
    • http://nokujike.townsendoutdoors.net/uploads/1/3/1/3/131379021/walekopuferu-xefobefiboku-buriko-sezuwigudag.pdf
    • http://files.kidsoutdoorliving.com.au/uploads/1/3/1/8/131871569/jolilakinefi.pdf
    • http://potowiz.osjbromsgrove.org/uploads/1/3/2/6/132695535/jelagerixo_vudeninisex_biguvejakojixu_dewogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/27655858197.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/xeromidiwugixikutin.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/explicit_wait_in_selenium.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/53191847753.pdf
    • https://static.usrfiles.com/ugd/b8c837_91fd7801517c4cf18d7b1b8ad3f80cc3.pdf
    • https://static.usrfiles.com/ugd/1b7c00_f99d3f78ca3549dca9bd0ecaee18736f.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/best_books_on_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/game_alien_shooter_untuk_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/how_to_bold_text_in_html.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/mulobunuruxikalagugasiku.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_off00004918.bin
80b0388d3d5a6d84099a9b581cb0c1598a6099c3e40eedbe007581c5c84354d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4918 5324 bytes
font_01_sfnt_off00005b4f.bin
f0ea699b08f01a29e22305033d64b2598025292d8892d93d3274226e88468b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 10104 bytes

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