Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5ae0daa52272df…

MALICIOUS

PDF

36.5 KB Created: 2020-08-09 01:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39687771ca4c0e21058f1c9cea015b41 SHA-1: f2226ad9c1fee901fa0f4955f2828ecabba88ca7 SHA-256: 9d5ae0daa52272df5a6808b852ca6a4aa2f1f6c476ecde670f791f5480490b66
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, masquerading as a solutions manual, that redirect to malicious infrastructure. The primary redirector URL is ttraff.com, which is flagged as malicious. The document body itself contains obfuscated text and the malicious URL, further indicating a lure to a phishing or malware distribution site.

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=mathematical+statistics+with+applications+7th+edition+solutions+manual+pdf
    • http://files.mentalhiccups.com/uploads/1/3/1/8/131871864/xotosejoruna_dezowu.pdf
    • http://files.mounthelenacounseling.com/uploads/1/3/1/4/131483219/f3badb79261.pdf
    • http://xafexaxif.melisakaye.com/uploads/1/3/1/6/131606346/7a11163.pdf
    • http://ruxowike.stuartbmeyers.com/uploads/1/3/0/9/130969539/zexoduwifekobapo.pdf
    • http://files.fayettemaine.org/uploads/1/3/1/4/131483201/783b3c0.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/8781551021.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/domipojixijozegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/columbus_blue_jackets_schedule_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/vogupamara.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/saniwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/19324815414.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/peduvonuvebazameveno.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/94054440390.pdf
    • https://cdn.shopify.com/s/files/1/0429/3014/3395/files/soniturekodusebazubaxakiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/84427113037.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/76814194862.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/pdf_markup_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/68500273543.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/
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f63.bin
15387f02680681430515ebd19742b9fec85b14683a336e795f2cf982f0fc402e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F63 5476 bytes
font_01_sfnt_off0000620b.bin
ee893b1d34ee39a44cbb7ccb9e15bc437f6a15547d62dfc4bc5689c9561d99b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 9964 bytes

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