Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e8806256f31eb5…

MALICIOUS

PDF

67.5 KB Created: 2020-08-31 04:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de3b497421fca73124bd59e492814226 SHA-1: 0fb246550830495bc3b3f85ff9bfd113cd8cd6af SHA-256: 35e8806256f31eb5b7ec61a5fe71443b9c501ea481ccff6c9b675045ce761416
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is a strong indicator of malicious intent. The document body, though partially corrupted, suggests a lure related to a 'manifesto'. The presence of numerous external links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=manifiesto+espa%25C3%25B1a+con+honra
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/74845180038.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/bejibevodovadokazetawela.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/pefukuxosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/94595012172.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/81049106645.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ad9e121e30941b399d137c18de57ba9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bdb69c9859f41878e8daa0600737776.pdf
    • https://static.usrfiles.com/ugd/97aff7_1f6a2a24054145508a7713580fd1cccf.pdf
    • https://static.usrfiles.com/ugd/68ec51_224f12b56df7448ba88c91e21a51ae9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5576bb4e82e473a9abac39e90c939a7.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/85497386661.pdf
    • https://cdn.shopify.com/s/files/1/0445/6959/1967/files/vizimaletuki.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1728/files/jonazalef.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/dikigagodudodivus.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/tabekagavorefazetigaz.pdf
    • https://cdn.shopify.com/s/files/1/0462/1438/1722/files/cantar_del_mio_cid.pdf
    • https://cdn.shopify.com/s/files/1/0440/3177/0789/files/top_anime_wallpaper_apkpure.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_off0000c785.bin
123bd18878c14394d8ef4a6b6f62f2e9c913101ca8c0d81420859b3fe60e823f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC785 5288 bytes
font_01_sfnt_off0000d93e.bin
404bc8df3c447b0e141da723a65e0eb88ba15fb7e10a1a826aa3b1dfae9e3550
pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 11532 bytes