Malicious PDF — malware analysis report

Static analysis result for SHA-256 076c050b591fc4d7…

MALICIOUS

PDF

43.6 KB Created: 2020-08-31 18:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee312de935507861166245a13eeafc1 SHA-1: 00593d4a4524ca60589e05819e3b2729c70e61af SHA-256: 076c050b591fc4d76eb1e0cd32f864d30ebb3494bd6b80b825b992516301ca31
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure related to a 'snake game' and embeds a large number of links, including one to a known malicious redirector. The embedded links likely serve to distribute further malicious content or phish for information. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL supports this assessment.

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/wix?keyword=snake+game++for+keypad+mobile
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/linewisosidu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gotenopow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/32067254214.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/57068108598.pdf
    • https://cdn.shopify.com/s/files/1/0439/0282/8699/files/wonderlic_test_with_answers.pdf
    • https://static.usrfiles.com/ugd/83b1b3_19fc2c53cbdd4cd88695ba7b587b5a8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b07c5737e394be2a518881186bb99aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_81e2ac2492d44ef2b21c53561778135a.pdf
    • https://static.usrfiles.com/ugd/5438e3_5aad6fbfb33f4207bb7b958c37562ac2.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/8342072095.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/ap_aadhar_card_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/31294020798.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/golwalkar_books_bunch_of_thoughts.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/ligavevenosejafukitiva.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/critical_theory_of_technology_andrew_feenberg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1741/2501/files/12547540306.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/7158053499.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/41143852833.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/40686434399.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_off00006c0b.bin
7f7391c86a9b9394fa4d1a7456c5392087b43e846b3d672849dc451b46c4b462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 5592 bytes
font_01_sfnt_off00007f07.bin
23cd1f3279aaab7eaf43a23177758daf8dff54c3352d8642de5ce6a2f424d1ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 10128 bytes

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