Malicious PDF — malware analysis report

Static analysis result for SHA-256 62051d59e6aed217…

MALICIOUS

PDF

62.7 KB Created: 2020-08-11 12:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0684178c7cac5ac4b1518ed32befd2b6 SHA-1: 1252526971b9781a702da90dec7b3f92e1d56bf8 SHA-256: 62051d59e6aed21759e28a420d35dac803faa122f29511fee4e6385094942dd2
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, suggesting an SEO spam or link farm operation. One prominent URL, 'https://ttraff.cc/pify?keyword=adjacency+matrix+in+graph+theory+pdf', is flagged as a malicious redirector. The document body also contains this URL and other PDF links, reinforcing the malicious redirection and link farm attack pattern. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or spamming intent.

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.cc/pify?keyword=adjacency+matrix+in+graph+theory+pdf
    • http://files.moannasworkroominteriorsandstaging.com/uploads/1/3/1/4/131437834/pirilin.pdf
    • http://files.mtagate.org/uploads/1/3/0/9/130969300/2236455.pdf
    • http://files.simplymatchmaking.com/uploads/1/3/0/7/130739495/7b461d083ed7bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/antacids_classification.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/dixijalabevezoxinafuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/best_app_linux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1173/files/residential_lease_form_ny.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/66221031908.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/waxokupufipogiviberurexof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/btl_vanquish_me.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2646/files/nukudetefapudowokuvuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/ravez.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/rujagigosaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/28624142887.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008af4.bin
1cdd5b638631159daabeba43ad4e9d0f684af404da2af5ca8b924fdd2fa80413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 5384 bytes
font_01_sfnt_off00009d28.bin
22e2403f6226b1b0d7200d98471631eed90da316d0ff82cb5d77f52a4035909c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D28 13792 bytes
font_02_sfnt_off0000c9a2.bin
b314ae29165264da86e7e13d94b53fe5566f334bfb5cb0dcda59251aab20f73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A2 16204 bytes
font_03_sfnt_off0000dee1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.