Malicious PDF — malware analysis report

Static analysis result for SHA-256 16469ebcfa1237e6…

MALICIOUS

PDF

72.6 KB Created: 2020-10-28 10:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e9fa276aa819ba5bd14c7209fbb8dc9c SHA-1: 1ecc32ca4859b3f0ace169f3fc8cfea032cefbbe SHA-256: 16469ebcfa1237e6f17a3f100676d95612b59ad5bdb22b67cc66daf6484ceb14
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, with one identified as a known malicious redirector. The document body, though partially obfuscated, suggests a deceptive lure related to children's play. The presence of many external links, including to Shopify and Weebly domains, indicates a potential link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?keyword=how+you+help+make+children%2527s+play+more+complex In PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/kokapos_todekijodop_rezawamavotagax.pdfIn PDF document text
    • https://lakizixobatit.weebly.com/uploads/1/3/4/3/134325667/fuseredodasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5f9902b310d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f892b321400c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f9873f64a3c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1260/3042/files/angry_birds_matilda_and_bomb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5648/2472/files/4286319018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8039/3915/files/97494061177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8779/9492/files/kuvexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8432/3485/files/siratadawurumuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8326/6746/files/cluckin_bell_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/28033761214.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/14501966433.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/rationalist_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/cement_composition_and_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/78613994061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4188/2780/files/walmart_safety_1st_guide_65.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/pampered_chef_large_bar_pan_pizza_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/dumpster_apk_old_version_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 5636 bytes
SHA-256: 3f42ca273a560453e6131bca58587c933ae82ea06d1ec82434d34b5c5e9bee21
font_01_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 11384 bytes
SHA-256: 914656fcea30f65219985514905d07bdc4abfa459c9b4396da17ebe4237a099d

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