Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e10e9acde2c4ebf…

MALICIOUS

PDF

50.6 KB Created: 2020-08-18 19:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab21902d39b788ca05c4625b521a2c0 SHA-1: e8d74dc63f81b6fcc28d69238a9e241704186bd8 SHA-256: 9e10e9acde2c4ebf790b4ac3a1cc527a61da463357dc7db16236a2c3f40ad214
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, constituting a link farm. One of the primary links directs to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though obfuscated, contains the same lure text 'Jerry Maguire imdb parents guide' as the malicious URL, indicating a coordinated effort to drive traffic to malicious sites. No scripts were extracted, and the primary malicious activity observed is the redirection to external 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.cc/pify?keyword=jerry+maguire+imdb+parents+guide
    • http://files.rumbaking.com/uploads/1/3/1/3/131380547/4580397.pdf
    • http://files.fieldhouseantiques.com/uploads/1/3/1/0/131070434/6e1ba44ade166b.pdf
    • http://files.daytonxa.org/uploads/1/3/1/4/131452735/180acbeff4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/lepofesewogasoxopavemat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/indrajal_comics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/hurt_feelings_report_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/tuxanorimez.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/sunumubila.pdf
    • https://cdn.shopify.com/s/files/1/0438/0747/3821/files/46871102780.pdf
    • https://cdn.shopify.com/s/files/1/0434/0950/6471/files/3618439614.pdf
    • https://cdn.shopify.com/s/files/1/0450/5419/7910/files/fapifozumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/90407038929.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_off00007bdf.bin
4402e14979d1fbff1193c52dcd2ff96b681e5625f6cab74012426027668466d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 5476 bytes
font_01_sfnt_off00008e5c.bin
1f139dbd2cdc891316041d4bc74d07dd4d2fcf37f065b747180bc67e63c5aeed
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 15336 bytes