Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6823a33613c3f8…

MALICIOUS

PDF

42.7 KB Created: 2020-08-06 02:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a57bc1b4de4f290d1b6b218e7d6edc SHA-1: 7c2cf68b0dd9a18f61d6853da7371e8c5a1f43da SHA-256: 7b6823a33613c3f84a5884d91b578968ec9f6566478dcf7fea9a06bd2ac071c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'quantitative risk management' and a URL that appears to be a lure. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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=quantitative+risk+management+concepts+techniques+tools+pdf
    • http://files.bukuvintage.com/uploads/1/3/2/6/132682684/kizole-dovufa-sofulevugeduk.pdf
    • http://diwidepog.shartwell.com/uploads/1/3/0/7/130738943/a9a98d.pdf
    • http://files.chicagolandsoccer.org/uploads/1/3/0/7/130738676/pukazoxuse-jakajamejibunu.pdf
    • http://files.cognissart.co.uk/uploads/1/3/1/3/131380728/7548722.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/ssc_gk_capsule_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/fefosovoto.pdf
    • https://cdn.shopify.com/s/files/1/0428/0729/6163/files/42544781522.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12909571685.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/fopegaler.pdf
    • https://cdn.shopify.com/s/files/1/0434/3562/2552/files/jugomamesotupasumomixadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/82714300678.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/xawesufulepijuwatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/44979743666.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/docs._google_com.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/wefusuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/morphology_of_plants_and_fungi.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_off00005ad1.bin
de03a0a9fa1b5ca3865ca47188acc204c035f94245b15691b11aaa6a699158df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 5760 bytes
font_01_sfnt_off00006e3e.bin
af8faf03054bf960167a69a8dc361671adaed27c78267fb3f1e36874630d911c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3E 9720 bytes
font_02_sfnt_off00008f6e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 4324 bytes

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