Malicious PDF — malware analysis report

Static analysis result for SHA-256 af68d67ad5106258…

MALICIOUS

PDF

46.5 KB Created: 2020-07-22 00:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f453c0687033d47d99b3ad47f16f9cf0 SHA-1: 31a729765667e788ca0a1cbc0ac6dc64c07a7b07 SHA-256: af68d67ad5106258acd7f21565ab5d969d50f33d3d6501cbc63c13f1bfedc264
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'international political economy notes pdf'. The presence of a link farm and a high ML classifier score further support the malicious nature of this document. No scripts were extracted from this sample.

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/wb?keyword=international%20political%20economy%20notes%20pdf
    • http://files.cholseybluebirdsfc.co.uk/uploads/1/3/2/7/132712369/vejojelitar.pdf
    • http://files.sarapyszka.com/uploads/1/3/0/7/130740367/9b6aec2.pdf
    • http://files.jmoymi.com/uploads/1/3/0/7/130739059/97713fa3d6433.pdf
    • http://files.halloweencity.ca/uploads/1/3/1/3/131380345/wafezi.pdf
    • http://files.aceofdecks.com/uploads/1/3/2/7/132740352/maxovisexilodizolu.pdf
    • http://files.halloweencity.ca/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/42389230160.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/wejafatubovewolusiza.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/wimaparadakazarenezixeluk.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/juxibulijubereve.pdf
    • https://gavigefo.files.wordpress.com/2020/07/mivuzofolor.pdf
    • https://tusemopupoj.files.wordpress.com/2020/06/tesesevivuzonikogesiba.pdf
    • https://ratuwig.files.wordpress.com/2020/06/muvazufipewel.pdf
    • https://lusigezoxot.files.wordpress.com/2020/06/27575601780.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/96499703359.pdf
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/7054593858.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/kutozokewamugosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/43407777999.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/14391323093.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/36198792213.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_off000077c7.bin
56278004ff3e148b9462f486757a95cb424999eb2a551607bf8af1e023f49d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 5128 bytes
font_01_sfnt_off00008917.bin
0f5b318c17ee44f81a6ab558c4b756fb1688504e6a76e940882552c52bb2e924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8917 10760 bytes

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