Malicious PDF — malware analysis report

Static analysis result for SHA-256 55dd563c9697d94c…

MALICIOUS

PDF

67.7 KB Created: 2020-08-29 12:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ae8324b0d57dd846a7b34826f0e6e6a2 SHA-1: ff8643b6bd1d09b51c1495a419715c1505c8ec52 SHA-256: 55dd563c9697d94cffedb55271b13f0a6d181723be1b4090eb8af6b5890f1e96
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for software. This suggests a phishing or scam attempt to trick users into visiting a malicious site. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation or to host further malicious content.

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.me/wix?keyword=adobe+acrobat+professional+7+free+do In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6c0db040d4b84e08b5a1b5f7319341a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5f9c85f70c984a9ea71bcdac4e2a5f33.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7ca48d9cf1ea42d6b622902e88f03f13.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bff4998c205e45298f11042c574171aa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b975b632d8944172bf2e7ea2626eab0c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/writing_academic_english_pearson_longman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/la_television_estatal_canales_culturales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/buxiduremudigegimuxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/ab_exercise_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2395/7920/files/dewegonezewuzoliremiwodon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/types_of_biochemical_reactions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/83474183408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/67723576727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/molecular_biologist_s_guide_to_proteomics.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA036 5236 bytes
SHA-256: ed80b73e366b07ed55fcb18e42ceacf88a3360e67044a70402aaa10216252cd2
font_01_sfnt_off0000b2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A0 5360 bytes
SHA-256: 5243b75bd6cac41bf089e2a8a7514b8fdc763a11b1ec8102743006fc61aa8c43
font_02_sfnt_off0000c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 10420 bytes
SHA-256: 85409f142646436676ce573deec5eda2890653290f099eb33df4086330ca42b9
font_03_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 16488 bytes
SHA-256: 1d240a0535f2140f7c954fae970985d54487e451ba4ee00a2f6f8a8e98c285da

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