Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abb521c852f6a45…

MALICIOUS

PDF

121.3 KB Created: 2020-08-06 14:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d39171f28c4be6ef690b65ca0a1421 SHA-1: 6992548bf9516454eb26965cb939e8e6be1767fa SHA-256: 8abb521c852f6a45f04d7ba72590c5062d8cdb5a45e207ac16fbfb941be02fe2
150 Risk Score

Malware Insights

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

The PDF contains numerous links designed to manipulate search engine results, leading to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=paulo+coelho+adultery+novel+free+pdf+download, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure for free PDF downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=paulo+coelho+adultery+novel+free+pdf+download
    • http://files.gaeltachtcommunications.com/uploads/1/3/1/8/131872178/jenikowuwul.pdf
    • http://files.agbole.com/uploads/1/3/1/8/131857465/9918a2c.pdf
    • http://files.skincarebyjacquie.com/uploads/1/3/0/9/130969545/e55037.pdf
    • http://files.vivafitsb.com/uploads/1/3/1/3/131383860/zuxireli.pdf
    • http://files.gabrielaalbanhidalgo.com/uploads/1/3/1/8/131871424/xokozebazegepemedix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/ponebam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/35677017338.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/neural_tissue_mobilization.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/23897947228.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/libro_breviario_de_los_politicos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3841/6801/files/nekiwegakegawikisupawiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/duborupevusafuwezado.pdf
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/washington_post_march_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/4546/1909/files/minecraft_beta_1._7._3_texture_packs.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/vunugunat.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/77303420519.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_off0001a253.bin
cbd67b415c5f26a97200f200ce1ed6ed3273620043f96819c781c8cef48272a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A253 5320 bytes
font_01_sfnt_off0001b482.bin
c99982200a001d38e65229f2752aca5b89f31cf9542acd53ec1ee1575738cef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B482 10120 bytes