Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb91683e559cf41…

MALICIOUS

PDF

46.5 KB Created: 2020-08-17 18:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 980a5fef9f6db9598988b60592371745 SHA-1: ce20cd839635620b2ad2828b4eca46cd5de649a9 SHA-256: bdb91683e559cf41b56417be5766a78754fbc09113371a4729ba58b4d11ae5c2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as an 'Android update' lure, which is a common social engineering tactic. The document body, though heavily obfuscated, contains the same redirector URL. The PDF also contains a link farm pointing to other PDFs, suggesting a broader campaign. No scripts were extracted, limiting the analysis of further execution stages.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=android+update+huawei+p8+lite+2017
    • http://files.faithchapeloh.org/uploads/1/3/0/9/130969116/vititimafefad.pdf
    • http://files.aelitasattic.co.uk/uploads/1/3/0/8/130814172/11aa56.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/97224965189.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/tilumeratoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/mimokixezulufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/43491998486.pdf
    • https://cdn.shopify.com/s/files/1/0434/9470/3270/files/dictation_exercises_for_english_learners.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/bunch_of_thoughts_book_in_marathi_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdf
    • https://cdn.shopify.com/s/files/1/0428/6654/0711/files/deruwuvowekemepexonipuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/mezulek.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/strategic_planning_framework.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/85186577679.pdf
    • https://cdn.shopify.com/s/files/1/0436/6529/3462/files/kixafa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d6.bin
c2dda219744a65c2ad8803585165f8036116f0b86cfe97b66c14a09ab370ae34
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5432 bytes
font_01_sfnt_off00007b55.bin
4f4fc8f658be1d1c8efa775af939937972b91203cad5f1eff888894774192141
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B55 10360 bytes
font_02_sfnt_off00009ec0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC0 4324 bytes