Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d736fc01f7fc39d…

MALICIOUS

PDF

63.9 KB Created: 2020-09-07 03:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa0271b2e673522d77b72134d6bc16cd SHA-1: 2a2ef50de3e806dc55cac6fb209b4ea87c02f0dd SHA-256: 1d736fc01f7fc39d9381da13f488569595fbd1d588a44333d2ea12f585161138
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The primary malicious URL identified is https://ttraff.me/wix?keyword=density+practice+problems+worksheet+answers+chemistry. The document body is heavily obfuscated but contains references to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=density+practice+problems+worksheet+answers+chemistry
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/10964420074.pdf
    • https://cdn.shopify.com/s/files/1/0429/2332/7644/files/capitalism_and_schizophrenia_anti-_oedipus.pdf
    • https://cdn.shopify.com/s/files/1/0443/6302/2492/files/65392692317.pdf
    • https://cdn.shopify.com/s/files/1/0447/1724/4570/files/bangla_protibad_full_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0459/7032/5664/files/ancient_rome_map_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0447/9034/9975/files/lavafa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/dujemisopibidofugirig.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/common_laboratory_apparatus_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0462/7968/8341/files/kivor.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/shop_rental_lease_agreement_format_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/capital_lease_payments_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/24638137102.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/nimabuxunuki.pdf
    • https://cdn.shopify.com/s/files/1/0453/3475/7531/files/31992567919.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/asclepius_wellness_pvt_ltd_balance_sheet.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_off0000aac7.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC7 2828 bytes
font_01_sfnt_off0000b4c1.bin
ccba4685d01750ef5d6e5cd542e926f9da6ce2c835ee4c983922f8b7ddad9989
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C1 5572 bytes
font_02_sfnt_off0000c79f.bin
44a259b3e5bc51cd303fa59dc11c3750a11229f64a18a6f6a9f3a38c5c8d87d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC79F 12984 bytes