Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd34869c2abd90d0…

MALICIOUS

PDF

49.8 KB Created: 2020-08-30 15:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83629b5bdc45b83db45a938a35c336ee SHA-1: abf5b68d4f4edf0b25e74f0b59769f9e5dc51bdb SHA-256: dd34869c2abd90d0759e3e463e930dc5eda80cff736e0e7754b0f2ca0e3c7769
160 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an invitation, which is a common social engineering tactic. The document also includes a large number of links to external PDFs, likely for SEO manipulation or to obscure the malicious destination. The presence of a password-protected archive lure suggests an attempt to bypass gateway security by encrypting the actual payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=alumni+homecoming+invitation+templat
    • https://static.usrfiles.com/ugd/ade4e6_9bcdcb90362a419198460325f729c0f8.pdf
    • https://static.usrfiles.com/ugd/516793_1eec57e8df194d1ca53eff410a76b7c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51e4b763c4d4ca480252d4b11fa2a4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_24841f9d180540919a1375c8fd60701a.pdf
    • https://static.usrfiles.com/ugd/bf650e_756781e7aaec4685b72c00bdb13c0440.pdf
    • https://static.usrfiles.com/ugd/5b9a87_7e5fec06aa744932aeaff864ab4d7c48.pdf
    • https://static.usrfiles.com/ugd/b8c837_91e99408ba1e4e819a71593f890275e5.pdf
    • https://static.usrfiles.com/ugd/9dda13_e218ff1e639b4148902f86a636502f10.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e117074dfaf411d888b606c2b7bed3b.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/52901499274.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/lanufivuwawadesorug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5274/files/dogejenimutizijal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/litodexipire.pdf
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/piriformis_syndrome_stretches_sitting.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/degree_botany_textbook.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_off000061bd.bin
37febe60d716c3bfcf4fdf5672cc44ac343e6056c53f0eb1621d80cb900f4a32
pdf-font-stream PDF embedded font (sfnt) at offset 0x61BD 9624 bytes
font_01_sfnt_off00008199.bin
a6ab2bb50d5db3b6e7c17017ac9d4b7271081c357460496b051927c18ec9256d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8199 5124 bytes
font_02_sfnt_off000092df.bin
2bbe29ea0177f8a425d591edcebe8c4b0b482e4b70728dd09ecb152ef4b68bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x92DF 11776 bytes