Malicious PDF — malware analysis report

Static analysis result for SHA-256 800e4af0838700d2…

MALICIOUS

PDF

45.1 KB Created: 2020-07-31 07:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24311d724b475a029586e50b2b037ab SHA-1: a8fb9757aa0aa1c468e1b051676aec38c042743c SHA-256: 800e4af0838700d2182b5ae300f54d4943f97f2efda43ad21b9ac010b14f7fb8
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the presence of numerous external PDF links suggests a link farm designed for SEO manipulation to attract victims. While no scripts were extracted, the embedded malicious link is the primary indicator of compromise.

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.com/pify?keyword=abnormal+psychology+an+integrative+approach+pdf+download
    • http://files.zerowastelady.com/uploads/1/3/1/0/131069869/5346419.pdf
    • http://files.zahirudin.org/uploads/1/3/2/6/132682790/diselatigilipaxov.pdf
    • http://files.stjamescheboygan.org/uploads/1/3/0/9/130969231/gosowodefaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/vuvagi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/84849370173.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/tetapabomobodesefewuwubiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/33577855668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/birujemoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/muvipenam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/lidefajaxukeboluwib.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/zilotolamikufabofujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/mawirifelarajezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/pozepatikupuru.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_off00006847.bin
e2b00b0c6b17e333374ebcd88c28071d0089eb0a4ea806241a0cb4560b8d7b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6847 5740 bytes
font_01_sfnt_off00007b9d.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 1800 bytes
font_02_sfnt_off0000842b.bin
e253e3e1365c6876ea796a00986f57663cc08fa417dc13ce28b799b7c5596c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842B 10044 bytes

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