Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e77064b1dc4fe28…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 01:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 913ca7b4be1de4532f817bab66cbb7b1 SHA-1: 108b98ba6e00e58b2ee48e6f8bd2c8d5ce539afe SHA-256: 0e77064b1dc4fe2877198dc9d1a391039f744eadc33a1f849c2c62684f49401b
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 a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that appears to be a lure for free design templates, likely intended to trick users into clicking through to malicious content. The ML classifier strongly supports the malicious verdict.

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=powerpoint+material+design+template+free
    • http://files.illuminatingideas.org/uploads/1/3/1/4/131438823/tasexogejotemod_safutedapewano.pdf
    • http://bilus.whippetclubofscotland.co.uk/uploads/1/3/2/7/132712315/76be1f5da8.pdf
    • http://files.fleenorfamilyadventure.com/uploads/1/3/2/6/132683001/a71e00d5cdb44d.pdf
    • http://files.valgbbo.com/uploads/1/3/1/4/131482881/wavalezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/14634988904.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/77175324096.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/63340776737.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/28133714651.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/sobipatun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kivamusefelozadadazub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88490435411.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/approximation_theory_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/cognos_report_studio_concatenate_fields.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/balifuvupopevijakokoji.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/24010846798.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/december_2018_monthly_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0443/9490/5766/files/berlin_conference_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657e.bin
6fb84d06922d4cc58d7932abec6b0eb71e8677f73b880e79430d6be86e612f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5456 bytes
font_01_sfnt_off000077f9.bin
c354fb4fb9ea288d257be03312acb32973fa84fc2f0c9004fc4e099d5b703e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 9868 bytes

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