Malicious PDF — malware analysis report

Static analysis result for SHA-256 703a9e1578524e3a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-09 09:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86cdaa174ebaaf48ff9ae273c0f6f1b SHA-1: f2e62b390a0d79d5f7991296cc127c04b3268cae SHA-256: 703a9e1578524e3aacd47d0b19c6a7c93266f64f6a10dc30fd4ccecd649f57eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests a phishing or scam attempt designed to redirect users to malicious content. The presence of many external PDF links also indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=abulia+definicion+pdf
    • http://files.borrelienterprises.com/uploads/1/3/2/8/132814342/5955026.pdf
    • http://files.theimo.org/uploads/1/3/1/8/131856318/fexogubivafeloduwap.pdf
    • http://mufuj.starfenceandgate.com/uploads/1/3/0/9/130969426/tomiwaxebixanude.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/adobe_converter_free_download_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/car_parts_list_with_pictures_and_names.pdf
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/bosch_cctv_price_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/tobibutafuwisuxoxuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/galletas_de_la_suerte.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/68157900196.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/gazajifonotozig.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/jurnal_mengenai_akuntansi_biaya.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7122/files/valutigopeliwogaraw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/fifowipopivepize.pdf
    • https://cdn.shopify.com/s/files/1/0436/0876/8675/files/dirifep.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631b.bin
6c84f2176905abd553c46e52a5bfdf3d23fdf0394a156e65d4ab5628e140c372
pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 5004 bytes
font_01_sfnt_off00007436.bin
653f25b7984e3e8e135b05b4283a2074552af3d434dbde65bc4bf31b62adc763
pdf-font-stream PDF embedded font (sfnt) at offset 0x7436 11028 bytes