Malicious PDF — malware analysis report

Static analysis result for SHA-256 453f372eb452eb15…

MALICIOUS

PDF

71.3 KB Created: 2020-08-07 20:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9eeda8a58711d46434dc8f03362cf77 SHA-1: 71a7a5777db417bac7603249a33318e73a340f2c SHA-256: 453f372eb452eb150dfea4e543395146a058220ea31a711b9bb80e318764a57d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.cc/pify?keyword=antarctica+political+map+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting its primary purpose is to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=antarctica+political+map+pdf
    • http://files.allenrobinson.com/uploads/1/3/1/0/131070982/4687016.pdf
    • http://files.layeredintelligence.com/uploads/1/3/2/3/132303082/zisaxano.pdf
    • http://files.lsassetti.com/uploads/1/3/1/4/131483337/dogatovisopemar_xiwilalijijan.pdf
    • http://bumetukon.phoenix-feeds.com/uploads/1/3/0/7/130738524/833443.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/samasabarepuwiwipawej.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/wodosofabuvidobopupalutur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/77697594468.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/99004557599.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/4248051652.pdf
    • https://cdn.shopify.com/s/files/1/0438/3073/9106/files/bakenupitugigojobote.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/fetunoparifor.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/xopekogarogorerenosawelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/63318828092.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/4725765889.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/waxamilagozovimixulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7e.bin
9929e8aae7671aec50e4d65e5bd06088e2a25d43e304ee98e5731dfa51d4fa21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 5112 bytes
font_01_sfnt_off0000decf.bin
58ea9c6fea11478aa633327432946c5c32a5c77accbbb9c051babe23d6132c41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 16180 bytes

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