Malicious PDF — malware analysis report

Static analysis result for SHA-256 366f4408c3c704f9…

MALICIOUS

PDF

40.1 KB Created: 2020-08-13 22:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8aae6cd1710417f8a5e5d14973a6798 SHA-1: a546dda5c5a187dbb7cf941e3ed587fdec57d641 SHA-256: 366f4408c3c704f9aea1f36dd567d639cd4685c387df63394aff3c4afb9abd19
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'Facebook lite apk play store' and a URL that redirects to a malicious domain. This suggests a social engineering attack aiming to trick users into downloading malware or visiting malicious sites.

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/pify?keyword=facebook+lite+apk++play+store
    • http://files.medley6pack.com/uploads/1/3/2/6/132683137/7458165.pdf
    • http://xelat.spicesrus.shop/uploads/1/3/0/8/130874233/40eda94e4639.pdf
    • http://files.l912f.org/uploads/1/3/1/6/131636807/todawowidexit-fireniv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/job_interview_questions_and_answers_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0454/3217/6808/files/c_programming_aptitude_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/geomorphology_by_savindra_singh_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/arresting_citizenship.pdf
    • https://cdn.shopify.com/s/files/1/0429/5871/7087/files/biology_class_11_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/topaz_signature_pad_driver.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/neratusarifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/30485076905.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/mipaxomejoguzotij.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/melexibazizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/accountability_in_the_workplace.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d68.bin
67e24aa63b86f8874fec6a77486dedef0ec113765b453b77fbd559c42c6b4428
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D68 5188 bytes
font_01_sfnt_off00006f1d.bin
cba5c9345bb45101124cf8bc3bf17c3ebd64297697668a99417ac82e2769b62d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 10252 bytes