Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e8bb34c7133616…

MALICIOUS

PDF

152.5 KB Created: 2020-08-04 09:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 257664742aeb4a57ea275c84672ea4fa SHA-1: 703fdbd8942325478fb3029f833834b51026939a SHA-256: 24e8bb34c713361654dd3ebf1974fee6339a40f9255579f9590072cf62c3747c
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a download for a "watchmen comic download pdf". The ML classifier strongly flagged this PDF as malicious, and the embedded URL points to known malicious infrastructure. The primary intent appears to be directing the user to a malicious site through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=watchmen+comic+download+pdf
    • http://files.liftnrolltowing.com/uploads/1/3/1/4/131452887/824787.pdf
    • http://files.fitrev.com/uploads/1/3/2/8/132814302/239526.pdf
    • http://files.finenorwich.co.uk/uploads/1/3/0/7/130776619/301676.pdf
    • http://files.vibrantlifestudio.com/uploads/1/3/2/8/132814272/f12549.pdf
    • http://files.scuttsdrivingacademy.com/uploads/1/3/0/8/130874469/4931291.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/dilepuxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/47686285858.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/kudevanujofidejokusara.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sefumiwizekoreletete.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/cazadora_de_hadas_2_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/sagekolowitoxemosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/najojap.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/78591031585.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/nuzalifag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/changeling_the_lost_core.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/xubir.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_off0001ffee.bin
05fecee58f6481212a69aa9e99d4980466ad5bc53d5c8a4907e05c7cffeba357
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFEE 5224 bytes
font_01_sfnt_off000211af.bin
a5f85db78f9d4085e8bacd5efdc8741c48e539e3f5226893251e60753b6806e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x211AF 14188 bytes
font_02_sfnt_off00023ee0.bin
184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832
pdf-font-stream PDF embedded font (sfnt) at offset 0x23EE0 16120 bytes