Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2e13bd64a81242…

MALICIOUS

PDF

48.8 KB Created: 2020-08-27 23:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28694a704dfff6ef244af58522ca6bbe SHA-1: e19eb012d1f7fea05a75db509c6f924c33e8de5e SHA-256: cd2e13bd64a81242d709f3c837af16b88062d18f612645193fe1878e3e96fff9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=iron+maiden+blogspot+discography' which is likely used to redirect the user to a malicious site. Additionally, the PDF is flagged as a link farm, suggesting it's part of a larger SEO-based distribution scheme. No scripts were extracted from this sample.

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=iron+maiden+blogspot+discography
    • http://wawexuj.tribalsoundhealing.com/uploads/1/3/2/6/132695578/rajefopafejiju.pdf
    • http://lidogi.wagner-heavymetal.com/uploads/1/3/1/6/131606490/7262f549b02e365.pdf
    • http://files.sudburyrocksmarathon.com/uploads/1/3/1/4/131483143/0845ecd8d1de.pdf
    • http://dobetav.families4fauquier.com/uploads/1/3/2/6/132695663/1d4924.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/rtgs_application_form_corporation_bank.pdf
    • https://cdn.shopify.com/s/files/1/0441/1850/7672/files/separate_pages_adobe_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/mirc_registration_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/7869/7631/files/tesis_logistica_y_cadena_de_suministro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/kagakumaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/8152297183.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/act_1_scene_2_hamlet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0229/files/25170480005.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/nordictrack_ctx_910.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/description_of_andrographis_paniculata.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/35108446713.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_off000065a8.bin
bbc54f1e86148d56b561bbb51539cdad8d310da51b2d77e22b4c55bd38238169		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A8 5456 bytes
font_01_sfnt_off000077ef.bin
0267f3afbae50b593e3b6e31c2e80b025785ce64a636750ca736fdd6ea2a2b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EF 15376 bytes
font_02_sfnt_off0000a68f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA68F 4324 bytes

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