Malicious PDF — malware analysis report

Static analysis result for SHA-256 a152e000e0163cc3…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 01:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fdb2b0512537e3dba37058e87b273e8 SHA-1: 2937291c1c004806f5bfd9dc296097975d43e238 SHA-256: a152e000e0163cc301270b517972fc19122d5af85178c334389c93af32436709
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=que+es+uniforme+en+ingles'. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to the URL, suggesting a lure to click on the provided links.

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=que+es+uniforme+en+ingles
    • http://files.cheerfullydani.com/uploads/1/3/2/6/132681928/a93b6b7c24.pdf
    • http://boxekos.corkhives.com/uploads/1/3/2/6/132695615/vurojegerane-rosibewajuneb-widigelob.pdf
    • http://xoxakeva.huihefurniture.com/uploads/1/3/1/3/131378776/42ead80.pdf
    • http://files.gothamcoyote.org/uploads/1/3/1/0/131070196/bd158bb1e7c40.pdf
    • http://files.sculptingstudiopilates.com/uploads/1/3/0/7/130738739/32f3ff721ae80.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/gupuvajenapama.pdf
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/todavekomozafutobuwuxega.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/derudadafaganuporekivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/77803494955.pdf
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/pewovekinafud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/dujugavabilapejuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/5350/6969/files/zirolizuvuboz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/povedepewavuzigiximatetek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/42760661319.pdf
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/android_whatsapp_backup_location.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_off00005d87.bin
1bf05eac1c260cf1a04c5d892fc942b545b25ad1900ff9340bc3d918aac6e690
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D87 4940 bytes
font_01_sfnt_off00006e42.bin
c75201e99656283dda5a61bab09a1043b10446165bc05f2ddf5b730bb5e49126
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 10932 bytes