Malicious PDF — malware analysis report

Static analysis result for SHA-256 147b864c10856d22…

MALICIOUS

PDF

107.0 KB Created: 2020-08-30 04:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09983ea5ba4a8eb0559ec47cf3336024 SHA-1: 1273b94942ba40fbddfa014f1fac5912661bf964 SHA-256: 147b864c10856d220699e6748d17aafb9ed435136c25376da17d0c502ce0fd42
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary links, https://ttraff.cc/wix?keyword=eneida+de+moraes+obras, is flagged as pointing to known malicious redirector infrastructure. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content, possibly for phishing or malware distribution.

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.cc/wix?keyword=eneida+de+moraes+obras
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/japupasatenakal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/32880409442.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/57456936211.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/64613474428.pdf
    • https://cdn.shopify.com/s/files/1/0445/4242/7295/files/irritable_bowel_syndrome_stanford.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/valanenaxuxerifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/25103588159.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/13820931771.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/bhojpuri_video_film_2018.pdf
    • https://static.usrfiles.com/ugd/1d64af_29d0449d8beb49f3b95bafcd68b4d6cd.pdf
    • https://static.usrfiles.com/ugd/10b11f_91b94c0ce2e14a008e8ea1a8c925b0d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c3f0db402aa4661add6d593c1d3be1b.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_off0001664a.bin
8f1cbc3da18445c9856742e870a30579ec648b1c2e06ec1d1e2136a880f5a3e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1664A 5036 bytes
font_01_sfnt_off0001774f.bin
9a4b1488f96b8e258ceeaa4dec1a257ee4a4842d90e7cf705eddebd8c6110fad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1774F 11632 bytes