Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b012f57d2b0be98…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 07:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffaf9f5a3e5b5fea3bd77618fc27dfde SHA-1: 6358a7e83242194f3096d78eaa703387cdee59f0 SHA-256: 0b012f57d2b0be9832db03781a9206bcb0a8ef3e7e22e142ed20a15603f27505
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The presence of a 'download button' heuristic further supports a social engineering lure. While no scripts were extracted, the PDF structure and embedded URLs suggest a malicious document designed 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.ru/wix?keyword=ap+panchayat+secretary+digital+assistant+key+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0f5b72_c201b1c6c11f4221b1b174b2cac63909.pdf
    • https://static.usrfiles.com/ugd/a31856_9b591435e3224dd2912e888a0a2b717a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c21f3a9479542fc966c7fa7896050f6.pdf
    • https://static.usrfiles.com/ugd/4bb894_3a935e2671cd4d6eb6c0ed678c6641a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_85ce0891ebfe4382ab458826ebf6b0b0.pdf
    • https://static.usrfiles.com/ugd/eaf48f_26338c7d3284425f9a34afbc3b127e45.pdf
    • https://static.usrfiles.com/ugd/238140_68f22b6e2a96402d95fbaedf8aa5ff8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d94b033543fd4ea18abc292643af1d68.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/woluxexejuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9529/3094/files/my_bible_story_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/83798822319.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/18844992091.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_off000063a7.bin
49f2bd36154e22f560c3817956410142926564a3d38eb607ebc97596c1f2336b
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 5972 bytes
font_01_sfnt_off000077f8.bin
0274a0dd68f806784a73c65a510cfce3cd3e7423ce69ad2f78aee55fb11d5ed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 9984 bytes