Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecf273b4cb3b2ce…

MALICIOUS

PDF

49.2 KB Created: 2020-08-07 02:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 652abdfb186558fa5734f19363272086 SHA-1: 27f83a03384f10fea1b01034fba6bcd7608b50ed SHA-256: 6ecf273b4cb3b2ceb57526879fdea6e4acc4082f403f699b15eea0072d9c8b92
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Reliance mutual fund form pdf', likely a lure to entice users to click the malicious link. No scripts were extracted, but the presence of multiple external links and the malicious redirector strongly indicate a phishing or redirection attack.

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/wb?keyword=reliance%20mutual%20fund%20form%20pdf
    • http://files.chyarber.com/uploads/1/3/1/3/131380345/viwaz_wepitevenu_pesimazeko_sujeratuxujo.pdf
    • http://riget.houstonhighschoolptso.com/uploads/1/3/0/9/130969772/nefaxepemerow-wowofuwededew.pdf
    • http://files.sawvc.com/uploads/1/3/1/3/131381946/firoma-gavaxabezi.pdf
    • http://files.slebandboosters.com/uploads/1/3/0/7/130776131/a4b03938.pdf
    • http://files.joyofmakeup.ca/uploads/1/3/0/9/130969402/givekilokazona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/12742361570.pdf
    • https://cdn.shopify.com/s/files/1/0430/1452/0995/files/94420574363.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8784/files/30492109970.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/odisha_govt_school_holiday_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/zapuxejatibim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/45786722685.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/rexx_mainframe_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/pupujoperefovogarumixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/revora.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/91564144374.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/judosumasis.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_off0000601f.bin
ade8e2a11414ad2438276b5950eb41844c4a908900768f4b8c1757778335528d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 5012 bytes
font_01_sfnt_off0000710c.bin
1232407877c759318a9018bf2d8cf51f15f96d90ca2dff5d0ef8c07cdf3fbbad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 9260 bytes
font_02_sfnt_off000090aa.bin
c337dbbfb1fe420392cf20b6a61c2ffa605727382437dc3482e83c9812f23f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AA 17200 bytes
font_03_sfnt_off0000a92f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA92F 4324 bytes

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