Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c53dd0ae8f4246…

MALICIOUS

PDF

37.5 KB Created: 2020-10-03 03:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06b83df0143256b2c559723196664cfa SHA-1: c88851c06a0150b1732dd8442123b89d9deb8aef SHA-256: 38c53dd0ae8f4246ec7f12b6c2ae9a1e2230f1c53064566e1abe9cd8caaab967
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains, which is indicative of SEO poisoning or a link farm used to distribute malicious content. The primary redirector URL, https://ttraff.cc/pify?keyword=kenmore+model+13453+ultra+stitch+8+instruction+manual, suggests an attempt to lure users with search engine optimized content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=kenmore+model+13453+ultra+stitch+8+instruction+manual In PDF document text
    • http://files.heartlandjungians.org/uploads/1/3/0/8/130874614/6469498.pdfIn PDF document text
    • http://tekeru.westmichiganwinejazz.com/uploads/1/3/1/3/131380284/zenebo.pdfIn PDF document text
    • http://files.bingocompany.net/uploads/1/3/2/6/132682295/wukutirufabope.pdfIn PDF document text
    • http://files.sfhousemouse.com/uploads/1/3/2/8/132816160/5483ec6.pdfIn PDF document text
    • http://rewilul.wstcharity.com/uploads/1/3/1/6/131606295/sureme_xekoz_tufigunonoz.pdfIn PDF document text
    • http://files.utahfire.com/uploads/1/3/0/7/130775229/4959870.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/20606072916.pdfIn PDF document text
    • https://site-1038831.mozfiles.com/files/1038831/rumurudu.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/52462779464.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/35930202449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/bepowoxanubomubida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/shinee_replay_lyrics_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4891/4081/files/pipopidaleruxidejunol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2906/5639/files/refub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/new_heights_middle_school_phone_number.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000434d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x434D 5768 bytes
SHA-256: e6c185f0930d51a78d12cffa5f3c9c6f7ba1755973e6d67abab219bce8738cbf
font_01_sfnt_off000056cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56CB 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off0000667b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667B 9908 bytes
SHA-256: 46240f984e58414d315f5ec3de40901526f82c197c50062a348eb7f298198908

Open this report in the interactive analyzer, or submit your own file for analysis.