Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a540caa030c068…

MALICIOUS

PDF

57.8 KB Created: 2020-08-29 20:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa49bf815fac5b9567e763f2833948e9 SHA-1: 7e2a4c57a839b40926ac415d77f6ab879f98963c SHA-256: c7a540caa030c068a861b64eb98b8a4d5c6113c896a0b4f5987311d45e0e0b90
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body contains the URL https://ttraff.cc/wix?keyword=ascence+about+you+ncs, which is likely the primary malicious payload delivery mechanism. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination or to leverage benign domains for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ascence+about+you+ncs
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/bodokizekajugesazorodog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/92986498516.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6111/files/22049033143.pdf
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/63913429018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/zisoze.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/catholic_encyclopedia_farley_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/multiplying_binomials_and_polynomials_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/putilavova.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/393544654.pdf
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/xajofutujeduvelodasa.pdf
    • https://cdn.shopify.com/s/files/1/0450/6445/4294/files/hyperbole_and_a_half_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/51604873832.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b23.bin
4a26130fab1ed0827f86bd0866dd5d94c12cf7a54121ee4e2ccbc8fe9bb721d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B23 3548 bytes
font_01_sfnt_off000067cd.bin
e6f67a50fcab4bfaa6e48cd0c8bd9cc9bd9be8328b743dd44e3cbf13745bad0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CD 4728 bytes
font_02_sfnt_off000077de.bin
f72959ea11914560ebc3ca3bc02da8f9c3ec27748551a514540bdf9db7790252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 3448 bytes
font_03_sfnt_off00008622.bin
bdd933fab92b98effd2b19664375c3cace66ccb9228b53a6d2ff7f753f5fcb87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8622 14404 bytes
font_04_sfnt_off0000b432.bin
63992cc02f509bad70bd6072ef35459430b69f0bf3089289225374074503cb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB432 16184 bytes
font_05_sfnt_off0000c95b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 4324 bytes

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