Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de122093ff2bad9…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 01:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 962c0543613e8c380d2ad069bc04e9c2 SHA-1: a07264726ecc4433ef5562ff4b525831fa256ea5 SHA-256: 5de122093ff2bad9bd954ad87129320648ecaf28429bb316c70b257efd3b2eb0
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a song title, which is a common lure for phishing or malware delivery. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the URL. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting an attempt to drive traffic to various sites, potentially for SEO manipulation or further malicious redirection. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

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/pify?keyword=chehra+masoom+ringtone+song
    • http://files.psychologywizard.net/uploads/1/3/1/6/131637316/molugizoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/metikeno.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/adding_fractions_6th_grade_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/jolly_phonics_sight_words.pdf
    • https://cdn.shopify.com/s/files/1/0432/8010/5630/files/38945127373.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/wubulapuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/14515633339.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/zumejimofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/my_immortal_lyrics_meaning.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_off00004037.bin
b517bed06efbd766303320b81d166268e2e982f6d99ac5fe47124f4dce389208
pdf-font-stream PDF embedded font (sfnt) at offset 0x4037 4972 bytes
font_01_sfnt_off000050f2.bin
e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
pdf-font-stream PDF embedded font (sfnt) at offset 0x50F2 2044 bytes
font_02_sfnt_off00005a5e.bin
6ad06cace27e707ad28158f153e37bc8d27467f0c1e1f7334b9823c571df62ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5E 9672 bytes