Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f544b062f0af265…

MALICIOUS

PDF

55.3 KB Created: 2020-08-16 20:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc8b28be5100d0eb212c4e0e69834d68 SHA-1: da6ded137dbc1e42e2ace18f864602833172a2f4 SHA-256: 6f544b062f0af2651355287bce9e3454d1558b9a9a73030370e60bdac1a9ee70
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at https://ttraff.com/pify. The document body, though heavily obfuscated, contains text suggesting a lure related to a political map PDF, likely intended to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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/pify?keyword=north+america+political+map+pdf
    • http://files.writespacehouston.org/uploads/1/3/1/0/131070351/c083dc5ce4a4c.pdf
    • http://files.nbcspringfield.org/uploads/1/3/1/3/131383649/4313380.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/xegewemenid.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/12936331085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/buvuwosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/nuxogekinupexov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/zawexifej.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/80991445535.pdf
    • https://cdn.shopify.com/s/files/1/0428/5169/6796/files/pectus_deformity_of_the_sternum.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9868/files/vepifaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/14291704413.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/50658487579.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/fagutuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/langstroth_beehive_plans_metric.pdf
    • https://cdn.shopify.com/s/files/1/0438/1209/4109/files/imperative_sentence_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/15825327212.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b22.bin
8897861bd45d350e20c05fdabf657f9451790c07fae9365d5f2c35af237b9c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B22 5184 bytes
font_01_sfnt_off0000aca8.bin
c38c454e7ab621c1b7c001cd95fb645dc73e32dacb30e4645caa7c479ed0eab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACA8 10460 bytes

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