Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc98e2d33512a1b8…

MALICIOUS

PDF

76.8 KB Created: 2020-08-31 13:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f5083e9e7451f89bf1d82be21098d10 SHA-1: d87c220fc300cd8d9cd04dd6b9d5f88b2e6a894d SHA-256: bc98e2d33512a1b8ad927adc12b4876a4a33b3cb05d04659ccaaa4456f7c144e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Sound forge 6 serial number generator' and the malicious URL, suggesting a lure for users seeking software cracks or serial numbers. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation to drive traffic to malicious 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/wix?keyword=sound+forge+6+serial+number+generator
    • https://static.usrfiles.com/ugd/0f1814_e028a1fc75dc4680b2371d0f45f3eece.pdf
    • https://static.usrfiles.com/ugd/af0aa9_9c15cf7031ef4549800657235b1c4e4e.pdf
    • https://static.usrfiles.com/ugd/0047a4_6119f75358654281b7f8399c8080ab25.pdf
    • https://static.usrfiles.com/ugd/8b49c6_c51d4f4d04724390a48c64e23e37f4a5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/rejorilisetod.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/vamexigifukuxosik.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/95931682472.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/xiaomi_mi_a2_android_one_6_128gb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/32068428596.pdf
    • https://static.usrfiles.com/ugd/cb2bed_65ab6cac48484f4d98964fb6cf905802.pdf
    • https://static.usrfiles.com/ugd/405339_df60336eabca45cb897f9b7b544010c5.pdf
    • https://static.usrfiles.com/ugd/e2b09b_63aedd8a32294639bfbb41fead6cf89f.pdf
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/49527665351.pdf
    • https://cdn.shopify.com/s/files/1/0444/4736/7335/files/amber_heard_imdb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.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_off0000e296.bin
8e784e5389303bc9468f50705fe7f0eeb7bb51a392b3341c3b054f9f77da64f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5624 bytes
font_01_sfnt_off0000f5a0.bin
a8a434a6d722442eac5e4c07ff9756694c5289c23adec58cb4e3cdefe83b840a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 15188 bytes