Malicious PDF — malware analysis report

Static analysis result for SHA-256 02de7b532c186766…

MALICIOUS

PDF

66.5 KB Created: 2020-07-31 10:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 234474755dd8087e8bf1d9ac815edaa0 SHA-1: 3639abce8c8aaa4014401484a939b9749d1e7e1a SHA-256: 02de7b532c1867662fcec1e5283d99f21e5aa684df6457ef65dc1eba3f149a8c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, forming a link farm. One of these links, 'https://ttraff.cc/pify?keyword=surah+al+mulk+indonesia+pdf', is identified as a malicious redirector. This suggests the PDF is designed to lure users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded links are indicative 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=surah+al+mulk+indonesia+pdf
    • http://files.cassadagabrighidswell.org/uploads/1/3/0/7/130740571/7972335.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.mikewritesfunny.com/uploads/1/3/0/7/130739225/6169843.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/22598241023.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/81323553172.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/jobudotonasagofodifelege.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/2710841003.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/bofidojotexaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/96397008162.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/90848137894.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/70702243773.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/29699620100.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000c846.bin
6f9387e74b24a4820620a621a9835f14fc92637f116f0aa1d158a89788dd76cc
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC846 28700 bytes
font_00_sfnt_off0000941b.bin
c8bfadec768bba92d19aa21b61c12a590bdef33aaeb8aec3206ebf34faeb39eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x941B 5252 bytes
font_01_sfnt_off0000a5b9.bin
bcbedf17b00203196335154a66ba343669998a30981fbd61854acbc31cfa426c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B9 10052 bytes