Malicious PDF — malware analysis report

Static analysis result for SHA-256 1501644284e9b1b7…

MALICIOUS

PDF

47.4 KB Created: 2020-07-30 15:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad1826dd32a6b25337433c513420ff0c SHA-1: 21b2ccafa2bd3b4a7b0daef3cee4f4afc9216f85 SHA-256: 1501644284e9b1b73d9cf6b141c277f28a9e5c0a7f0b5036750ce3aa20994c21
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to downloading books. The presence of numerous external links, many pointing to Shopify domains, suggests an attempt to obscure the true malicious destination and potentially engage in SEO manipulation for malicious purposes. No scripts were extracted, but the primary threat is the malicious redirection.

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=best+urdu+islamic+books+free+download+pdf
    • http://files.magisterseniusu.com/uploads/1/3/1/8/131858287/9681e.pdf
    • http://files.howwecomeapart.com/uploads/1/3/0/9/130969656/kesezomeru_gowipepix.pdf
    • http://files.fiveoaksbeef.com/uploads/1/3/1/8/131871740/dalidug.pdf
    • http://files.carolynspearromance.com/uploads/1/3/1/8/131856991/gadokapupe.pdf
    • http://files.makelifehd.org/uploads/1/3/1/6/131636907/9193939.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/19211119130.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/4704456879.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/1880746571.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/54427673385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/vefifitumikovav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1047/files/wejud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/54158013120.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/46860860772.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/dubofudajizagizigusipipef.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0151/files/88857820630.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/79561691992.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/68419209892.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_007_off0000912e.bin
89081ba74203fd04d09dbee9ce7385f628966bbf0cc17b16fbaac36a2a2775a4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x912E 19180 bytes
font_00_sfnt_off00005b73.bin
2dad1f39b4ea80a4ef242adf836b4762dc90b892785812b30ff5b570661c0579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B73 5528 bytes
font_01_sfnt_off00006e2b.bin
d367db1774ec87fa609019df83aaa85de45bdba0678b298f5284fc78e6cf5863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2B 10324 bytes

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