Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a88ad47035c754…

MALICIOUS

PDF

46.3 KB Created: 2020-07-30 22:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c64e69f8262a2d0a3b8f1c747313ee SHA-1: 10a0db871a8e4428b46b803d572f9b177c45ee6e SHA-256: d2a88ad47035c7543fea3095c19bb5b61900951a5654b2ac6f431fa80752ce2e
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to ttraff.com, which is known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'service desk analyst technical interview questions'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. The heuristic findings confirm the malicious redirector and the link farm.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=service+desk+analyst+technical+interview+questions+and+answers+pdf
    • http://files.framemysore.org/uploads/1/3/1/3/131384789/7349004.pdf
    • http://files.monavalehospitalauxiliary.org/uploads/1/3/0/8/130814636/9c5b9b8e9839ae.pdf
    • http://files.pixiecovers.com/uploads/1/3/0/9/130969327/gulelifukov.pdf
    • http://files.milwaukeepizzacompany.com/uploads/1/3/1/3/131383476/6202834.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/57360168497.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/xozagoxod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0535/3885/files/merojomater.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0440/5651/0616/files/52885633949.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9200/files/vevedixaporejugituduxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/netokokitowevimibesew.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/43045629767.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/52048396875.pdf
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/80602466514.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/1689395761.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/71279196161.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.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/
    • https://cdn.shopify.com/s/files/1/0431/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d9.bin
9c4bc1f5fa41bc9cd98f1c1ec79117f4fb72cb23cbec3360f7fd07df1fb22e57
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 5672 bytes
font_01_sfnt_off00008838.bin
cfe836e47eb3a200a42a20ea6d3a1e82f9a002e2a40cbde2694b0014b0c64d9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 10328 bytes