Malicious PDF — malware analysis report

Static analysis result for SHA-256 5453f225e32f619f…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 22:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6744704906184415e9b1dded7c7b520 SHA-1: cd5fb8620b833d55bab3a4c579bba5c25bd1af9d SHA-256: 5453f225e32f619f1a0e561242116959f20a6fe86e643482bb3d24ce36b8b774
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL `https://ttraff.com/wix?keyword=transformers+bumblebee+battle+mask` is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous links to external PDFs hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify the attack pattern.

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.com/wix?keyword=transformers+bumblebee+battle+mask
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/15538828540.pdf
    • https://cdn.shopify.com/s/files/1/0445/6385/7572/files/bimutogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/10396310259.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/fugakifowapuwosikarovan.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/scope_change_management_process_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/kotisaren.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/fugevos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/printable_handwriting_sentence_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/panisow.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/anti_ragging_affidavit_2020.pdf
    • https://cdn.shopify.com/s/files/1/0452/4012/3552/files/all_cheats_of_gta_san_andreas_download.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_fc104569bd204de49993830e6cbe35cf.pdf
    • https://static.usrfiles.com/ugd/856cea_f994ee4fab614adf980c1b98e1fff623.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004954.bin
d74430bdb47d5652882c9869a7a1292a608041179bec8222402c0ba0da6e8e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4954 9896 bytes
font_01_sfnt_off000069c1.bin
1670055f544d8ef9b465582225f9344ac467fffddcce0d81fa4ee651da534bd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 4900 bytes
font_02_sfnt_off00007a50.bin
75299791b9c77c898cd270c04b7584ff7abf80079b79edd2113a738b970738fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A50 10844 bytes
font_03_sfnt_off00009f55.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F55 4324 bytes

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