Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f6840d35849c9c…

MALICIOUS

PDF

60.1 KB Created: 2020-08-22 12:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c1547e70a4c8f997420176a194c342 SHA-1: 4ba4bbf7e4ee9a0c0b1a5a62dd2c599ac769fdec SHA-256: d5f6840d35849c9c1168b17e3be4545eeaf36c59f7f9f87e929faf8d0005b377
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to a known malicious redirector. The document body, though partially corrupted, contains a URL that appears to be a lure for users seeking information on 'developer options android 7 apk'. This URL redirects to a malicious domain, suggesting the document's primary purpose is to redirect users to malicious content. The presence of numerous other PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic to distribute the malicious redirector.

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.com/pify?keyword=developer+options+android+7+apk
    • http://kanaze.redbarnmontessori.org/uploads/1/3/2/6/132681488/1956186.pdf
    • http://zodamezij.azzarodogs.com/uploads/1/3/1/0/131071258/kisulaf.pdf
    • http://files.womenmakingascene.com/uploads/1/3/1/4/131438510/159240.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/82208030056.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4774/files/6790094025.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/40059410231.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/45062133469.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/65419947683.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/dr_babasaheb_ambedkar_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/61080452946.pdf
    • https://cdn.shopify.com/s/files/1/0459/5951/2223/files/feputawubebazejapu.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_off0000afe0.bin
e0f228287ed87856c101016ddbf2d347a5116598385b670078f4b76296dc234c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE0 5156 bytes
font_01_sfnt_off0000c185.bin
07b8408cf23c2d67a02f4b195bebdcff6af4c3380fa9b5753a53a1c780583548		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC185 10084 bytes

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