Malicious PDF — malware analysis report

Static analysis result for SHA-256 74105dd8e0b1fbff…

MALICIOUS

PDF

50.9 KB Created: 2020-08-04 13:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5e9c86cca8db8fd01c76479420b0b8b SHA-1: d2650094bc543bb18c6ae26a715c41bc86df2f52 SHA-256: 74105dd8e0b1fbff325180f8c1c4f4db3e51bf8668d0a0df750fed52d7ebe2ec
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being ttraff.com, which is flagged as malicious. The document body, though obfuscated, contains text related to 'boundary conditions for electric field pdf' and the wkhtmltopdf application, suggesting a lure. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, and PDF_MALICIOUS_REDIRECTOR_LINK confirms a malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links and the malicious redirector suggest an attempt to lead users to malicious content or phishing 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.com/pify?keyword=boundary+conditions+for+electric+field+pdf
    • http://files.holthairandnails.com/uploads/1/3/1/3/131379409/venaw-babuf.pdf
    • http://fimixepi.thesavlife.com/uploads/1/3/0/8/130814788/fuxagubijotajovezito.pdf
    • http://files.aliciazeigler.info/uploads/1/3/0/7/130775639/nefenove.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/38132067173.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/buvumokamuledofure.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/40318532369.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/gedojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/49506149235.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/14687616532.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/66273061167.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/83881849060.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/nibolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/dijkstra_s_algorithm_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/alcatel_a206g_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/noviwuvado.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/resupanuniromadufalibatus.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/56609528283.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006925.bin
cdc27ac5c4f87836c7b3e7a4f0844ccb85078ffac8c0f808580c6544021fba01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6925 5300 bytes
font_01_sfnt_off00007b49.bin
469b87778c1d48adefca2fb5c7c2d44550d99bb747ea9587d15b0ea6ec7dc616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B49 14216 bytes
font_02_sfnt_off0000a885.bin
9e189ef198f51535c408346b8c65ac795b3126646015252e03f2bedd52deba3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA885 16284 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.