Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5ec6b2708cfbf6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 00:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1772a0c55fdd0d628c061e451e66465e SHA-1: 3cd1ddf7a785972039f7cde4da97341563c2fecb SHA-256: 7e5ec6b2708cfbf62545b87788b02ef640456b55178300962ced4c9d1478e99f
162 Risk Score

Malware Insights

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

This PDF document contains a high number of external links, many of which point to benign content, but one critical link redirects to known malicious infrastructure. The presence of a 'download button' lure suggests a phishing or social engineering attempt. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

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.link/wix?keyword=gerund+participle+infinitive+worksheets+with+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f6669a76336f4ab58e9517c4f2a0b01a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d603d55f2d9e4556afd594a153c3224a.pdf
    • https://static.usrfiles.com/ugd/b8c837_63f5b5e8bde64ac286054fa631610ed4.pdf
    • https://static.usrfiles.com/ugd/b8c837_29761a4f13a847ff9d8959fd0521ee1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb53133584154903b1f367876c521722.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4725/files/95116210170.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/27539635985.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/1520040095.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/oculus_quest_steam_vr.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/zesudofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/zupowevegoturufirobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/59742475044.pdf
    • https://cdn.shopify.com/s/files/1/0440/7879/2869/files/zuvozafazafanagobamejufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/kinuson.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/malayala_manorama_calendar_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a7f1cb66f4347cf9df3c1238c4691dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_758c2b7f06cc41bfa13a33e69335c60d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2cef5258e2f4b43b3ac8039376843e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d387e0ed889c4da19f37f4ee07faba37.pdf
    • https://static.usrfiles.com/ugd/b8c837_814beba33fbf4176a8a69cdb8eead0bf.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_off00006956.bin
86b301b66e7eb55794cff1ef9d6d8d07f33ada2afc12713abdd6f52770a48664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6956 5492 bytes
font_01_sfnt_off00007c17.bin
0609a6d810e15ba11f881e9534f9b7948b280077d576092b48b476e6ef34fb71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 10084 bytes

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