Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff535ff116014d58…

MALICIOUS

PDF

43.7 KB Created: 2020-08-17 05:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b8a3c8983f7bc16c42b87834254c852 SHA-1: 06e21f6f336f124ccc561923a431169a9d66a814 SHA-256: ff535ff116014d588cb1e001ad0b5312a518ceea271aac0a7c296a58ee8fb6af
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though partially corrupted, contains text related to 'Pumpkin ideas for halloween templates' and an embedded URL pointing to a redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=pumpkin+ideas+for+halloween+templates, which is used to lure victims. The document also contains numerous other links, many hosted on cdn.shopify.com, which are likely part of a link farm to improve SEO for malicious content.

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=pumpkin+ideas+for+halloween+templates
    • http://bodutowe.passport2pain.com/uploads/1/3/0/7/130739678/jaminokuwu.pdf
    • http://files.timelesschocolates.com/uploads/1/3/1/4/131405958/345ebb84e.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/rikob.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/19131215392.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8487/files/11390091677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/degidomimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/biohacking_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/tazasififulunikezuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/gudoluzenetoxinasodowawed.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/44469558878.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/jugezamebole.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/veryfitpro_apk_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/ashoka_the_great_biography.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_off00006c2d.bin
1ce14d1033a6966fdd1036e4e9397009275870b959becdd04bf424204fe53e38
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2D 5436 bytes
font_01_sfnt_off00007e8d.bin
75f05fe2951c114cedb83dda6e0d74fe066c808b80818ce8b83ca422cf0b4beb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 10424 bytes