Malicious PDF — malware analysis report

Static analysis result for SHA-256 069795d25c6f9cdb…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 08:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3e3ad9a15a37c0fa32b8125383fcb2e SHA-1: ec8c063f5a11110864ccc4800f64e2fdfe83459e SHA-256: 069795d25c6f9cdb0afd3c4404d83ceb352d28e4fa9d1a92a90a02c90db6ccd0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged the PDF as malicious. The primary malicious URL, 'https://ttraff.ru/pify?keyword=cito+begrijpend+lezen+groep+8+pdf', suggests a phishing or scam lure related to educational materials. The presence of a link farm indicates an attempt to distribute traffic to various external resources.

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.ru/pify?keyword=cito+begrijpend+lezen+groep+8+pdf
    • http://fizep.otto-and-olive.com/uploads/1/3/0/9/130969742/c880a7ad8af95.pdf
    • http://files.debsoutherland.com/uploads/1/3/1/4/131453250/mikotajogeromuzerej.pdf
    • http://files.laurieann-ranger25.com/uploads/1/3/0/8/130814935/divibulamanof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/redemption_manual_5._0.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/90582802408.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/52960259052.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/86309338130.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/nugufalufaretavekoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/84257542147.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/87203379199.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/39596878082.pdf
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/62058924553.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/kimifuvemixixuxoradatajuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/xirelapirapif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/numagawazo.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_off00005e8d.bin
529e2b8ee1cdf2f04e858bbb4ec2ee317761977d8a77f9b4fa1c6b910354940a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8D 5184 bytes
font_01_sfnt_off0000704c.bin
d21d8598352f284a40722fcf444bd9c68cf02d89d2c10ea84c4c74b0eec52426
pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 13776 bytes