Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d16ff578bd4c10f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-27 19:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd7bf89edc18e7148ce5ea274589e22 SHA-1: e78e5fd85644ac1e6b29f2ccf05b0739b0ff9974 SHA-256: 1d16ff578bd4c10fa4f3b3df99dd34709d8267e689c3455fadae718ef9b917d7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for movie downloads, which is a common social engineering tactic. It embeds numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to potentially harmful content.

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=ms+dhoni+full+movie+download+hd+720p+movies+counter
    • http://gebato.district1rodeo.com/uploads/1/3/1/3/131383483/rizunonodar.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/assessment_of_working_capital_requirement.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/28886427033.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/81915625827.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/36543570336.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/tomuvapik.pdf
    • https://cdn.shopify.com/s/files/1/0437/3928/3608/files/statistical_inference_theory_of_estimation.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/63030799239.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1189/files/89323270990.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/solitaire_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/alkaline_trio_remains.pdf
    • https://cdn.shopify.com/s/files/1/0439/2147/3691/files/hey_you_pink_floyd_lyrics.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_off0000602b.bin
390a166bea6089c6a1616664bd1ccd5ac8b7ccdbec26471e800ace59eceb1c0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 5904 bytes
font_01_sfnt_off00007437.bin
b62838593c2c48d8dcbc6e4c504d1ec200a1197064a83eab9505a198b4e8f97b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7437 10924 bytes
font_02_sfnt_off00009917.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9917 16164 bytes