Malicious PDF — malware analysis report

Static analysis result for SHA-256 c112529de86a5a76…

MALICIOUS

PDF

46.1 KB Created: 2020-08-19 10:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86f1a9f08fecb445ec83d4b0b232e6c8 SHA-1: e0c5ca6c9b20c7826a2c4403eff0cff1a2364c24 SHA-256: c112529de86a5a760483a0cbbcfedb3f771cef10b00869b394eedeaf7edfe4cc
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=android+one+phones+under+15000`. This URL is presented within the document body, disguised as a promotional offer. The PDF also contains a large number of embedded links, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, and the document body is largely obfuscated, but the primary intent is clearly to redirect the user to a malicious site via the embedded link.

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=android+one+phones+under+15000
    • http://files.playtherapyworks.com/uploads/1/3/0/7/130775503/xogixo.pdf
    • http://files.bradfordwatkinsmedia.com/uploads/1/3/1/3/131381363/ferosalu-juzuroxox.pdf
    • http://nomej.stonesthrowstudio.com/uploads/1/3/1/8/131871721/7674457.pdf
    • http://fufagaj.srmadr.com/uploads/1/3/1/4/131406082/lekizizagigi_kexurulifevum_napabi_mebezasef.pdf
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/wadetipagubisowiterafotub.pdf
    • https://cdn.shopify.com/s/files/1/0462/2942/2229/files/33094178860.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/xivuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/24187300125.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/tinkers_construct_fractured.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/xididoseje.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/vuxixaritepevab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/jajiwifetasibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/old_man_s_journey_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/16135867139.pdf
    • https://cdn.shopify.com/s/files/1/0460/0158/6337/files/29411447982.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/16014979154.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_off000075f1.bin
3e49dda33f8e4d9e30cffdcc94f24edc105e497e59e0a048a9398c0987a5ff4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F1 5112 bytes
font_01_sfnt_off00008758.bin
7855b395e1dc68752dd09be9dc08c373d1fe5f0714cfe0e487b7b7d6938a03d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8758 10564 bytes