Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d125b62cb7d5d30…

MALICIOUS

PDF

47.7 KB Created: 2020-08-09 03:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03a2cde50191fd5ef3669f52e3d4f60c SHA-1: 25116bdb2cb0470434d60d314987b40ba0862ad9 SHA-256: 0d125b62cb7d5d304829bcdb31585c26177268d8039a8c999476803bed8f6c22
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 pointing to Shopify domains, but also includes a critical link to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or distribute further malicious content, potentially disguised as downloadable PDFs.

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=sand+casting+process+pdf+download
    • http://josuwija.gildersome.net/uploads/1/3/1/4/131406893/jijab-fuleberoxariro-makadetalipisuf-fezogezonino.pdf
    • http://files.athenastorm.org/uploads/1/3/2/7/132740296/difepivakabewab-dirupivujav-woxalal.pdf
    • http://files.neilmassaro.org/uploads/1/3/1/6/131606954/tafejuwufa.pdf
    • http://files.tamesmusic.com/uploads/1/3/1/4/131483265/1350188.pdf
    • http://files.vagabond.sk/uploads/1/3/0/7/130776081/7386250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/making_the_connections_padias_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/348311713.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/5922871008.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/english_words_with_persian_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/never_winter_nights_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/1400/0538/files/reducing_size_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/hack_sign_ost_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/65840925464.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/2045903751.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_off00007d07.bin
57ff7639a1d9d19365b717d28bddd9c7d2b93f3a3682a2f6f8021e5a00bd0ad0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D07 5520 bytes
font_01_sfnt_off00008fec.bin
c01bc8b87458ec3b585d6fda2f95d56cba52f6e6aac120f75545cb0ca365614c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEC 9980 bytes