Malicious PDF — malware analysis report

Static analysis result for SHA-256 6512919037302d15…

MALICIOUS

PDF

58.8 KB Created: 2020-08-02 21:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeacb16c6fb07bc66ebae3fa7bbdac17 SHA-1: c79805669bab73174746834a030fc5d6175f2fb0 SHA-256: 6512919037302d15bd4491e1ec122736ceadf1b5747bcc365136f2875875170e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains a mass link farm pointing to various PDF files, with one URL leading to a known malicious redirector. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to press Win+R or paste a command, consistent with social engineering attacks designed to bypass macro restrictions. The presence of embedded URLs and the malicious redirector suggest an attempt to lure the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/pify?keyword=lilim+persona+5
    • http://files.unparalleledtransformation.com/uploads/1/3/0/7/130738894/dazix-fukosisumiwe-xusavaniruwukiv-xilanel.pdf
    • http://files.theccoproject.org/uploads/1/3/1/0/131070581/5246634.pdf
    • http://files.schoolofthoughtblog.com/uploads/1/3/0/7/130739919/db6cfd1f1496.pdf
    • http://files.astudiofenelonfalls.com/uploads/1/3/1/4/131414743/9140009.pdf
    • http://files.alliriceonstilts.com/uploads/1/3/1/3/131379540/bb0c002f1edf810.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/21896798968.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/radegaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/73090648929.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/goxifitevovilomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/kejulukanebisupem.pdf
    • https://cdn.shopify.com/s/files/1/0434/7156/9046/files/dezelaraxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/23879091949.pdf
    • https://cdn.shopify.com/s/files/1/0446/8968/6681/files/fairy_tail_episode_276.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/63166217866.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/mesinowikufefuvasekixix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/25484846881.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686d.bin
0c754c2983b0bc16432561f7ac9d8f896e83f53973d302c050b8c0c9f2407127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 19140 bytes
font_01_sfnt_off0000a4dd.bin
ee1394e8970b6aa6d8e9d33f4704f1cd5752d5e57047f1222aba6bed550e2cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4DD 5028 bytes
font_02_sfnt_off0000b5da.bin
190c541cd0c004eb903c711d92701aa6b291911f61f82970d8a8f5a44ab2bce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DA 12472 bytes

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