Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa1e7b61664fed6…

MALICIOUS

PDF

79.7 KB Created: 2020-09-10 04:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40014a925ea90fd326ea19640daa47dd SHA-1: 74c106d7968772deeb6898053c41790b7cbb1b54 SHA-256: 7aa1e7b61664fed6db5d4647a2ed53fbe0b99de9d2f4af03b4362d7db0fd18fa
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to trick users into visiting a malicious site, likely for phishing or malware distribution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=bihar+ssc+inter+level+admit+card
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/ce14f3_5a7150ec702e4ed881b0d51c7d49ff4c.pdf
    • https://static.usrfiles.com/ugd/d48fe3_2bb26d3f326e4aa7962d0a6d1bace624.pdf
    • https://static.usrfiles.com/ugd/0511f5_b3f9ec7f3f58418cafb81bbf4b755b2e.pdf
    • https://static.usrfiles.com/ugd/badafb_d51ca923242e427e95a7c8e3ab1b0a22.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/72295358685.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/coplanar_waveguide_with_ground_via.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/ladugeru.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0561/files/vuvunutulagipodovog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/18100615027.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/77611830141.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/jexezexapujewixel.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/program_activate_windows_10_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d79f086051b493cac22bfa2ce73769c.pdf
    • https://static.usrfiles.com/ugd/ca300b_7485431b16b54a71a5c631c6bdf2ee6d.pdf
    • https://static.usrfiles.com/ugd/5c7528_977aa0dd1084447b905b882f25479ce4.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bceb.bin
c09fcfe90dbc1aef6eb409ad89a945b87c1ec3f3babe2fb726e52af68cc8b941		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEB 5288 bytes
font_01_sfnt_off0000cebe.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBE 3720 bytes
font_02_sfnt_off0000da22.bin
7c33e9ae6a7df0ae35db477d545f558cab56cd1ff5555aaf348c72ab7b5b14c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 15728 bytes
font_03_sfnt_off00010aee.bin
27a53acaae5d784d183aabd66683646ceae60a35d13250dc1ce88d67811ca47d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 11172 bytes

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