Malicious PDF — malware analysis report

Static analysis result for SHA-256 653995c3d3eea269…

MALICIOUS

PDF

49.3 KB Created: 2020-09-04 19:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ef689ec6a1431fea6b91261c66471cc SHA-1: 6911da639ec845cda356919e18edea143498dc92 SHA-256: 653995c3d3eea269efd33378720ceccc519e8761d271c6d8a91c030bacc11e61
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful content. The ML classifier also flagged this PDF with high confidence. Although no scripts were directly extracted, the presence of malicious links suggests an intent to lead the user to a compromised site, likely for phishing or malware delivery.

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=genero+no+binario+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/bedirisuzaposafonuriw.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5348/files/adanga_maru_movie_hd_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9709/files/49517948212.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/wogewufabedojatotiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/ncert_biology_class_12_genetics.pdf
    • https://static.usrfiles.com/ugd/895bef_5eeb37d949db414382576a2800a259c0.pdf
    • https://static.usrfiles.com/ugd/429b25_6435d8a2f2914c579ea3324f45911185.pdf
    • https://static.usrfiles.com/ugd/2d1648_effaab0ffcf24259a00db7f0788a5c01.pdf
    • https://static.usrfiles.com/ugd/227d0f_66f53afe1c784f0cbca46a18c40e6e13.pdf
    • https://static.usrfiles.com/ugd/fac845_f2bac57dca824eb8ab99f70837f7f9a9.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.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dd2.bin
b4b873b6b1da9a51dc21ea988a73da6e855049bd9168bc1e777701b2b22de37a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 4996 bytes
font_01_sfnt_off00007ed4.bin
baafb547a7a3a75763bf9012da07f0f57ae49e6024189f0b972ec852d8d73c12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED4 6308 bytes
font_02_sfnt_off00008f1a.bin
ff1ac449839fcd9ae2061e858f8c7d4d8d824bca91abde7d8325fd57f3216f49
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1A 12124 bytes