Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f4ed84c284e99e…

MALICIOUS

PDF

40.4 KB Created: 2020-09-17 09:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cee6f3e3eb6f424089336a32b5c5419f SHA-1: 5c4b2a7a2d14a6dc2cb90d47bc39238feee316f6 SHA-256: e7f4ed84c284e99e321181d635aeb9b7f9f5cc7b4d1a8a9f1476146a0923a63a
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'lotro crafting guild guide'. The document body and embedded links point to a URL that is known to host malicious redirectors, likely to serve a second-stage payload. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic.

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.club/wix?keyword=lotro+crafting+guild+guide
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/80499743120.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/85140398138.pdf
    • https://cdn.shopify.com/s/files/1/0458/0373/3158/files/dulek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/ac_market_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9783/files/zadisejuderiruveluwenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/zogefifovetolipedalede.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/basic_multivariable_calculus_marsden_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/3328936599.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/pimaduruvitejevobedimet.pdf
    • https://bdbc05c8-b0b4-42e0-a60a-6e8776d878f7.filesusr.com/ugd/69695d_225e59e7426040ae9e9677ec2d1adffb.pdf?index=true
    • https://cdcd0102-b516-4916-a0df-bb0bd0d95d99.filesusr.com/ugd/143c98_4862f47cb1884f6d802ebb27c33848b0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/32078828185.pdf
    • https://cdn.shopify.com/s/files/1/0461/6821/1608/files/lenovisubem.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_off000060a5.bin
68544de2ca21025f49896e209502fdd29e87d016c768c1cf12a707c2e58fed6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 4952 bytes
font_01_sfnt_off00007190.bin
435fe3daee6933be6d36ad32e996a51a61a1b727d6523dd426226487b6c2dadd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 10524 bytes