Malicious PDF — malware analysis report

Static analysis result for SHA-256 17883e52d5eaff69…

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 07:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42243352ad0de7e74785b4cb0bca5d60 SHA-1: 763a4b38b6e2e78d2b69fcdf162d85cc3dffd28c SHA-256: 17883e52d5eaff69231d1dae0733e9dc7f677a20de7e6d8e280bdba16d422236
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, with one pointing to a known malicious redirector. The document body text is obfuscated but contains a URL that appears to be a lure. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO spam campaign. No scripts were extracted, but the PDF structure and embedded links indicate a malicious intent to redirect users to harmful 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.com/wix?keyword=telenovela+completa+caf%25C3%25A9+con+aroma+de+mujer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/edit_online_free_with_same_font.pdf
    • https://cdn.shopify.com/s/files/1/0432/0146/2436/files/61834016809.pdf
    • https://cdn.shopify.com/s/files/1/0440/0827/6126/files/dafimofavufuwobe.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/cdphe_stormwater_permit_forms.pdf
    • https://cdn.shopify.com/s/files/1/0445/5959/7732/files/fodopedoporotufokizu.pdf
    • https://cdn.shopify.com/s/files/1/0467/8146/4729/files/41699578839.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/jotowofanigigijava.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/45204764406.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/manawixebere.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/gutafagusivegufipesime.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/1164300215.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/doctor_strange_hd_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006610.bin
f470fb6dd6e30679f2eda9c0971b7eea2c3ce3c5ac0a7de1db76c1651a431042
pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 5184 bytes
font_01_sfnt_off00007766.bin
5ea84d1b35f25f89fa5ffaae7204b3d4d93410b88ba79c3eee959a896d545c03
pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 10756 bytes
font_02_sfnt_off00009a6a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6A 4324 bytes