Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc898564b094ac90…

MALICIOUS

PDF

41.5 KB Created: 2020-08-23 01:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa563150f21a14754afb3294b5c9247 SHA-1: 38af535112a2849575c110ed7c143ca57b29b2a5 SHA-256: fc898564b094ac90aa8b4d11568297910142aaa51d39ae4c7b219c59a45e499d
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, 'https://ttraff.cc/pify?keyword=c.+a.+t.+s+hack+apk+2018', which is flagged as malicious. The document body also contains this URL, suggesting the primary intent is to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=c.+a.+t.+s+hack+apk+2018
    • http://files.bigskyminiaturegolf.com/uploads/1/3/0/7/130740073/8763696.pdf
    • http://files.babbiemuseum.org/uploads/1/3/0/7/130740298/8cefb2ea.pdf
    • http://tupeb.indiajoneseatery.com/uploads/1/3/2/8/132814930/miribonomugimi.pdf
    • http://files.gotericreativearts.com/uploads/1/3/1/1/131164355/7606709.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/70872362856.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3435/files/zojowawupovuloribexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/tetugapilowujilowup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/la_jolla_zip_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/74713823597.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/flatland_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/64233071992.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/kugipolenaduma.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/usmc_7_ton.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/jimixokojegewesumak.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2065/files/itunes_error_590624.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/55064594193.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_off00006398.bin
d3cfd9ccaa608c7eae4e762eb7594dfbd38ab8f920a253d9033f5acb6a9b35fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6398 5416 bytes
font_01_sfnt_off00007605.bin
38fcbb666d3527bca4022254f81867db9bc4b445ee1ef4291912929f501721a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 10268 bytes