Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55ff41fd1212c4b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 00:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deffaa12f5272d3a9fd366120b25f6d9 SHA-1: 424118ad5684954984399ef6c84d34c4cd940add SHA-256: e55ff41fd1212c4b4719110fed2041cd2647bcd58b909675cd40cf99cef83262
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious URL, disguised as a download for 'Panda VPN apk cracked 2019'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to benign Shopify URLs, but the primary malicious link is the most critical IOC.

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=panda+vpn+apk+cracked+2019
    • http://files.lindaandrei.com/uploads/1/3/1/8/131871871/jijufoluregowutaxur.pdf
    • http://lotaniw.usafortunae.com/uploads/1/3/0/9/130969754/1f963ceb.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/all_animals_names_in_english_to_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/adverb_and_adjective_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/webelos_pin_placement_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/pofelefukifurulajawujetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/64786492379.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7126/files/pdf_to_word_converter_small_size.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/bade_acche_lagte_hai_male_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0437/4990/0439/files/arsenic_contamination_in_west_bengal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/repowasiru.pdf
    • https://cdn.shopify.com/s/files/1/0438/4296/1570/files/introduction_to_c_programming_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/burulalorobebiforulupilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/zefoxalewokerajiwubuvas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bee.bin
0106e124da8017a786dddb932c7a5e77ccb2d0c43526cde3323b39295fc2c555
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEE 5464 bytes
font_01_sfnt_off00006e9a.bin
09442d22184c034950022e035950fe8746f54aaaa5dc81f352b6a855fe5d5da2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 9948 bytes