Malicious PDF — malware analysis report

Static analysis result for SHA-256 645be47c2d50b847…

MALICIOUS

PDF

45.9 KB Created: 2020-08-16 18:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e581b921cfb8ff54fedbe5d147662cdd SHA-1: 3211e0b9e0bd4775f1beb4495fa3534c8a31c1f5 SHA-256: 645be47c2d50b84747796375e7512f07a2faf97f2b894e3422bb01e68e35c176
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body also contains a URL that appears to be a lure for a 'Gmail signature template free', further suggesting a phishing or redirection attempt. The presence of a password-protected archive lure indicates an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=gmail+signature+template+free
    • http://titifojo.reimak.com/uploads/1/3/2/7/132740954/benotevizex-muzegise-gabebivet-motif.pdf
    • http://files.ndta.ca/uploads/1/3/1/3/131382808/lotuvumilutaxukerope.pdf
    • http://loker.pinmag.online/uploads/1/3/0/8/130873947/nebilatuxefawexewat.pdf
    • http://files.homestead-soaps.com/uploads/1/3/1/3/131382955/vapamiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/79484886077.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/72300965830.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/allen_bradley_plc_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/2974/8122/files/vuwitedak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/bolaxoxumilelunogaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/repupenibufutonoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/national_anthem_song_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/blank_bingo_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/34526901972.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/xovafexide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/58128002480.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_off00007667.bin
aa8de2f1a5e74d5a26a0ae20f5ca7b3b285bf256bdd9e9f8d563fc366b813976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 5252 bytes
font_01_sfnt_off0000882f.bin
76992770a569dc2af1a6da45491a866a6cd06220a4441775534541c7fd60b042		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882F 10048 bytes

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