Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7b7f334deb037f…

MALICIOUS

PDF

48.5 KB Created: 2020-08-05 06:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d6bd513f3e2bd185a3a39049bce8f5 SHA-1: 2f14572d367fb9c1dabf32d23a379083e054c0db SHA-256: ef7b7f334deb037f5737c063b87be993d8206a7e55be0242cfa3ac712c3ba27d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, disguised as a document title, likely leads to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=brand+positioning+examples+pdf
    • http://files.planetearthexperience.com/uploads/1/3/0/7/130738943/cf6f8d5f.pdf
    • http://files.eliezercall.com/uploads/1/3/2/3/132302940/3168259.pdf
    • http://files.oysterbayhistorical.org/uploads/1/3/1/0/131069899/eca106.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/23856029313.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/4723187798.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/34877401713.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/62754479643.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/waterfall_model_in_sdlc.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/49858920991.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/30342539102.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/lijodab.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/nuriterebosenowefamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/wimazilupipomagufisade.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/interpretacion_del_electrocardiograma_normal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/50361354773.pdf
    • https://cdn.shopify.com/s/files/1/0429/6582/7747/files/vokekasuvibenoduvebudigu.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_off000071ef.bin
13c445602a76711284e9adb06fbe8476c81578ef0c50941458e6803b0a8f0362
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 5268 bytes
font_01_sfnt_off000083bd.bin
917241fbc6a0d8e5be81df571fe691c0f141b6cbb81a18261f527632cb824cac
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 10324 bytes
font_02_sfnt_off0000a718.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA718 4324 bytes