Malicious PDF — malware analysis report

Static analysis result for SHA-256 3815a00a30048854…

MALICIOUS

PDF

44.3 KB Created: 2020-08-08 03:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c491566f083ca831ab0a9f5dce43cb51 SHA-1: 35fa4c1cc1f1e33cc028ddc2cdf3e1f337550159 SHA-256: 3815a00a300488545ff07083813f02734d23e78f0bb012803231ade8f21add12
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL pointing to a redirector service known for malicious activity. This suggests the document is designed to lure users to a malicious site through a chain of redirects. The ML classifier strongly supports the malicious nature of this PDF.

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=excelvan+barcode+scanner+manual+pdf
    • http://wepawi.ebenezerconyers.com/uploads/1/3/2/6/132682883/c6aaf1e4004.pdf
    • http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdf
    • http://files.northhobby.us/uploads/1/3/1/3/131379312/3d5c0a13.pdf
    • http://files.bennyzrodshop.com/uploads/1/3/2/6/132695568/6827709.pdf
    • http://pimuru.andrewjfilson.com/uploads/1/3/1/0/131070718/bazuxevisojap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/war_torn_front.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3690/files/28371155526.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/zopameji.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/23327212009.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/2944331574.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/romeo_dallaire_shake_hands_with_the_devil.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/lamotowepudot.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/how_to_hack_cookie_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/82149255279.pdf
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/nimujorosovonobobaboruxib.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/wusodixaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000615f.bin
19cdfd78e2b9484964b7754352c6304629e7a5158b479d63874797035453a7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 5280 bytes
font_01_sfnt_off0000732e.bin
cb0905b3bca224d19b64c91435f10aa158291ad409b0af17a47b4f729afc5d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732E 10184 bytes
font_02_sfnt_off000095d9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 4324 bytes

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