Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51d96a79e34b9c2…

MALICIOUS

PDF

49.2 KB Created: 2020-08-03 14:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438b890feee8367b89ccb0fa86734a4d SHA-1: b98b7c6659fd301008186deaa38ea9eceb39b0bd SHA-256: b51d96a79e34b9c2abaac353a5d624f39685b6ca4e547d17f64cbeead18c6803
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, found in the document body and also identified by a heuristic, redirects to `https://ttraff.cc/pify?keyword=importance+of+educational+administration+and+management+pdf`. This indicates a social engineering attempt to drive traffic to malicious redirectors, likely as part of a phishing or scam campaign. No scripts were extracted from this sample.

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=importance+of+educational+administration+and+management+pdf
    • http://files.femindia.net/uploads/1/3/0/7/130775402/4677557.pdf
    • http://files.canenationband.com/uploads/1/3/1/6/131606390/1368781.pdf
    • http://files.sergeruffato.com/uploads/1/3/0/8/130814121/5253245.pdf
    • http://files.reclaiminghopecounseling.com/uploads/1/3/1/4/131437636/7927012.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/modulus_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/1660735192.pdf
    • https://cdn.shopify.com/s/files/1/0435/8592/9375/files/the_nanny_season_1_episode_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/jokinedus.pdf
    • https://cdn.shopify.com/s/files/1/0446/2844/3299/files/optimization_in_operations_research_rardin_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/74311872552.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/demirasukijeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/joxovaronilutog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/zedupekerirelibigu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/tubab.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/sanakoxekoxijixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/windows_xp_virtualbox_no_internet.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_off00008213.bin
7dd2156c4970084688a29c857f0f2338d39700d73bb9604989dfa2cef18082e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8213 5412 bytes
font_01_sfnt_off00009462.bin
6feaad4ca2f0265ae028260a22709979c12ee34b08211e8bbca9ba67087aad24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9462 10372 bytes

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