Malicious PDF — malware analysis report

Static analysis result for SHA-256 885f009f767e1014…

MALICIOUS

PDF

54.2 KB Created: 2020-08-21 04:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32b945d868036121b0ff4989f71ff58a SHA-1: 3fbbd766519e8287286dd4dd76b9e2dbdac02d83 SHA-256: 885f009f767e1014dab306559ed8130d2f0beb50b9b6f47b24d6a11045ca6f2f
152 Risk Score

Malware Insights

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

The PDF contains a lure for 'Netflix premium gratis para android' and embeds multiple links, including one to a known malicious redirector at ttraff.cc. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a phishing attempt.

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=netflix+premium+gratis+para+android
    • http://files.iwfmichigan.org/uploads/1/3/0/8/130874204/zokuzobexofelazufadu.pdf
    • http://files.freshairfitness.net/uploads/1/3/0/7/130738892/padominonu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0673/6037/files/16978380383.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/lupamagepalori.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/48341569680.pdf
    • https://cdn.shopify.com/s/files/1/0438/6865/1680/files/verizon_fios_internet_outage_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/halcones_de_venta_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/bozededukomowogememorejon.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/nuvusubexafababalab.pdf
    • https://cdn.shopify.com/s/files/1/0430/5210/5881/files/kegiwotozul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/lepogafavofaze.pdf
    • https://cdn.shopify.com/s/files/1/0438/4312/5413/files/create_a_bitmap_from_drawable_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/8574/9665/files/20088553816.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_off000079f6.bin
35d5369d8e41f841d134d9b2df58d9884dfe53b6f0a165b49b4fb25a0deb9adb
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F6 5280 bytes
font_01_sfnt_off00008bdc.bin
56dd4a9cc6f0a1043325f78f1a82c6f238af938f26a694bb2f6a0f067ce5045e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDC 16004 bytes
font_02_sfnt_off0000bdce.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCE 4324 bytes